<PAGE>   1
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON SEPTEMBER 22, 1998
                                                    REGISTRATION NO. 333-
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                         ------------------------------
 
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                         ------------------------------
 
<TABLE>
<S>                         <C>                         <C>                         <C>
                 PROTECTION ONE, INC.                            PROTECTION ONE ALARM MONITORING, INC.
(Exact Name of Registrant as Specified in Its Charter)  (Exact Name of Registrant as Specified in Its Charter)
 
         DELAWARE                   92-1063818                   DELAWARE                   93-1064579
      (State or Other            (I.R.S. Employer             (State or Other            (I.R.S. Employer
      Jurisdiction of           Identification No.)           Jurisdiction of           Identification No.)
     Incorporation or                                        Incorporation or
       Organization)                                           Organization)
</TABLE>
 
                                      7382
            (Primary Standard Industrial Classification Code Number)
 
(For Co-Registrants, please see "Table of Co-Registrants" on the following page)
 
<TABLE>
<S>                                                    <C>
                                                                      JAMES M. MACKENZIE, JR.
                                                               PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                                                        PROTECTION ONE, INC.
                 6011 BRISTOL PARKWAY                                   6011 BRISTOL PARKWAY
            CULVER CITY, CALIFORNIA 90230                          CULVER CITY, CALIFORNIA 90230
                    (310) 342-6300                                         (310) 342-6300
 (Address, Including Zip Code, and Telephone Number,     (Name, Address, Including Zip Code, and Telephone
                                                                              Number,
    Including Area Code, of Registrants' Principal           Including Area Code, of Agent For Service)
                   Executive Office)
</TABLE>
 
                                   Copies to:
                               JEREMY W. DICKENS
                           WEIL, GOTSHAL & MANGES LLP
                         100 CRESCENT COURT, SUITE 1300
                              DALLAS, TEXAS 75201
                                 (214) 746-7700
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this Registration Statement becomes effective.
 
     If the securities being registered on this form are being offered in
connection with the formation of a holding company and there is a compliance
with General Instruction G, check the following box. [ ]
 
     If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]
---------
 
     If this form is a post-effective amendment filed pursuant to the Rule
462(d) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. [ ]
---------
                         ------------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
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                                                                           PROPOSED            PROPOSED
                                                                            MAXIMUM             MAXIMUM
             TITLE OF EACH CLASS OF                  AMOUNT TO BE       OFFERING PRICE         AGGREGATE           AMOUNT OF
           SECURITIES TO BE REGISTERED                REGISTERED           PER UNIT         OFFERING PRICE    REGISTRATION FEE(1)
---------------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                 <C>                 <C>                 <C>
7 3/8% Senior Notes due 2005.....................    $250,000,000            100%            $250,000,000           $73,750
---------------------------------------------------------------------------------------------------------------------------------
Senior Guarantees(2).............................         --                  --                  --                  --
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</TABLE>
 
(1) Calculated in accordance with Rule 457(f) under the Securities Act of 1933,
    as amended.
 
(2) The 7 3/8% Senior Notes due 2005 are fully and unconditionally guaranteed by
    the Guarantors on an unsecured, senior basis. No separate consideration will
    be paid in respect of the guarantees in accordance with Rule 457(n)under the
    Securities Act.
                         ------------------------------
 
    THE CO-REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE CO-REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
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--------------------------------------------------------------------------------
<PAGE>   2
 
                            TABLE OF CO-REGISTRANTS
 
<TABLE>
<CAPTION>
                                                       STATE OR        PRIMARY STANDARD         IRS
                                                         OTHER            INDUSTRIAL          EMPLOYER
                                                    JURISDICTION OF     CLASSIFICATION     IDENTIFICATION
                       NAME                          INCORPORATION       CODE NUMBER           NUMBER
                       ----                         ---------------    ----------------    --------------
<S>                                                 <C>                <C>                 <C>
WestSec, Inc. ....................................       Kansas              7382            75-2683068
Westar Security, Inc. ............................       Kansas              7382            48-1169432
Network Holdings, Inc. ...........................     Delaware              7382            75-2418786
Network Multi-Family Security Corporation.........     Delaware              7382            75-2050133
DSC Enterprises, Inc. ............................     Maryland              7382            52-1949951
Comsec/Narragansett Security, Inc. ...............     Delaware              7382            06-1093130
</TABLE>
<PAGE>   3
 
Information contained herein is subject to completion or amendment. A
registration statement relating to these securities has been filed with the
Securities and Exchange Commission. These securities may not be sold nor may
offers to buy be accepted prior to the time the registration statement becomes
effective. This prospectus shall not constitute an offer to sell or the
solicitation of an offer to buy nor shall there be any sale of these securities
in any State in which such offer, solicitation or sale would be unlawful prior
to the registration or qualification under the securities laws of any such
State.
 
                SUBJECT TO COMPLETION, DATED SEPTEMBER 22, 1998
 
PROSPECTUS
                       OFFER TO EXCHANGE ALL OUTSTANDING
                          7 3/8% SENIOR NOTES DUE 2005
                                      FOR
                          7 3/8% SENIOR NOTES DUE 2005
                                       OF
 
                     PROTECTION ONE ALARM MONITORING, INC.,
                                   AS ISSUER
                                      AND
          PROTECTION ONE, INC., WESTSEC, INC., WESTAR SECURITY, INC.,
     NETWORK HOLDINGS, INC., NETWORK MULTI-FAMILY SECURITY CORPORATION, DSC
                               ENTERPRISES, INC.
              AND COMSEC/NARRAGANSETT SECURITY, INC. AS GUARANTORS
 
    Protection One Alarm Monitoring, Inc., a Delaware corporation
("Monitoring"), and the Guarantors (as defined) hereby offer, upon the terms and
subject to the conditions set forth in this Prospectus and the letter of
transmittal accompanying this Prospectus (the "Letter of Transmittal," which
together constitute the "Exchange Offer"), to exchange $1,000 principal amount
of 7 3/8% Senior Notes due 2005 (the "New Notes") issued by Monitoring for each
$1,000 principal amount of 7 3/8% Senior Notes due 2005 (the "Old Notes") issued
by Monitoring (the "Original Offering"), of which an aggregate principal amount
of $250.0 million is outstanding. The form and terms of the New Notes are
identical to the form and terms of the Old Notes except that the New Notes have
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), and, except for certain transfer restrictions, registration rights and
terms providing for an increase in the interest rate on the Old Notes under
certain events relating to registration of the New Notes. The New Notes will
evidence the same debt as the Old Notes and will be issued pursuant to, and
entitled to the same benefits of, the Senior Debt Indenture (as defined)
governing the Old Notes. The Exchange Offer is being made in order to satisfy
certain contractual obligations of Monitoring and the Guarantors (as defined).
See "The Exchange Offer" and "Description of the New Notes." The New Notes and
the Old Notes are sometimes collectively referred to herein as the "Notes".
                         ------------------------------
      SEE "RISK FACTORS" BEGINNING ON PAGE 7 FOR A DISCUSSION OF CERTAIN FACTORS
THAT SHOULD BE CONSIDERED IN CONNECTION WITH AN INVESTMENT IN THE NEW NOTES.
                         ------------------------------
    The New Notes will bear interest at the rate of 7 3/8% per annum, payable
semi-annually in arrears on February 15 and August 15 of each year, commencing
on February 15, 1999, and will mature on August 15, 2005. The New Notes will be
redeemable, in whole or in part, at the option of Monitoring at any time and
from time to time at a redemption price equal to the Make-Whole Price (as
defined). See "Description of the New Notes -- Optional Redemption." In
addition, in the event of a Change of Control Triggering Event (as defined),
each holder of the New Notes will have the right to require Monitoring to
repurchase all or any part of such holder's Notes at a repurchase price equal to
101% of the principal amount thereof, plus accrued and unpaid interest and
liquidated damages, if any, thereon to the date of purchase.
 
    The New Notes will be general unsecured obligations of Monitoring and will
rank pari passu in right of payment with all senior indebtedness, whenever
incurred, of Monitoring, including the Company's Senior Credit Facility (as
defined), and senior in right of payment to all subordinated indebtedness,
whenever incurred, of Monitoring, including Monitoring's 13 5/8% Senior
Subordinated Discount Notes due 2005 (the "Discount Notes") and the 6 3/4%
Convertible Senior Subordinated Notes due 2003 (the "Convertible Notes"). See
"Description of the New Notes." The Notes will be fully and unconditionally
guaranteed (the "Guarantees") on a senior unsecured basis by the Guarantors. The
Guarantees will be unsecured and will rank pari passu with all other unsecured
and unsubordinated indebtedness of the respective Guarantors. See "Description
of the New Notes -- General" and "-- Certain Covenants -- Subsidiary
Guarantees."
                         ------------------------------
 
    MONITORING WILL ACCEPT FOR EXCHANGE ANY AND ALL OLD NOTES VALIDLY TENDERED
AND NOT WITHDRAWN PRIOR TO 5:00 P.M., NEW YORK CITY TIME, ON         , 1998 (THE
TWENTY-FIRST DAY FOLLOWING THE INITIATION OF THE EXCHANGE OFFER), UNLESS
EXTENDED (AS SO EXTENDED, SUCH TIME AND DATE BEING THE "EXPIRATION DATE").
TENDERS OF OLD NOTES MAY BE WITHDRAWN AT ANY TIME PRIOR TO THE EXPIRATION DATE.
THE EXCHANGE OFFER IS SUBJECT TO CERTAIN CUSTOMARY CONDITIONS. SEE "THE EXCHANGE
OFFER."
 
    In order for a holder of Old Notes to participate in an Exchange Offer, such
holder must represent to Monitoring that, among other things, (i) the New Notes
acquired pursuant to such Exchange Offer are being obtained in the ordinary
course of business of the person receiving such New Notes, whether or not such
person is the holder of the Old Notes, (ii) neither the holder nor any such
other person is engaging or intends to engage in a distribution of such New
Notes, (iii) neither the holder nor any such other person has an arrangement or
understanding with any person to participate in the distribution of such New
Notes within the meaning of the Securities Act, (iv) neither the holder nor any
such other person is an "affiliate," as defined under Rule 405 promulgated under
the Securities Act, of Monitoring or any Guarantor, and (v) if such holder or
other person is a broker-dealer, that it will receive New Notes for its own
account in exchange for Old Notes that were acquired as a result of marketmaking
activities or other trading activities. See "The Exchange Offer -- Purpose and
Effect."
 
    Each broker-dealer that receives New Notes for its own account in exchange
for Old Notes pursuant to the Exchange Offer, where such Old Notes were acquired
by such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such New Notes. The Letter of Transmittal states that by so
acknowledging and by delivering a prospectus, a broker-dealer will not be deemed
to admit that it is an "underwriter" within the meaning of the Securities Act.
This Prospectus, as it may be amended or supplemented from time to time, may be
used by a broker-dealer in connection with resales of New Notes received in
exchange for Old Notes where such Old Notes were acquired by such broker-dealer
as a result of market-making activities or other trading activities.
 
    No public market existed for the Old Notes before the Exchange Offer.
Monitoring currently does not intend to list the New Notes on any securities
exchange or to seek approval for quotation through any automated quotation
system, and no active public market for the New Notes is currently anticipated.
Monitoring will pay all the expenses incident to the Exchange Offer.
 
    The Exchange Offer is not conditioned upon any minimum principal amount of
Old Notes being tendered for exchange pursuant to the Exchange Offer.
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
 
                 THE DATE OF THIS PROSPECTUS IS         , 1998.
<PAGE>   4
 
                             AVAILABLE INFORMATION
 
     POI and Monitoring are, and the other Guarantors will be, subject to the
informational requirements of the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), and in accordance therewith file reports, proxy statements
and other information with the Securities and Exchange Commission (the
"Commission"). Such reports, proxy statements and other information can be
inspected and copied at the offices of the Commission at Room 1024, Judiciary
Plaza, 450 Fifth Street, N.W., Washington D.C. 20549, as well as at the
following regional offices of the Commission: The Citicorp Center, 500 West
Madison Street, Suite 1400, Chicago, Illinois 60661 and Seven World Trade
Center, Suite 1300, New York, New York 10048. Copies of such material can also
be obtained from the Public Reference Section of the Commission at 450 Fifth
Street, N.W., Washington, D.C. 20549 at prescribed rates. In addition, the
Commission maintains a World Wide Web site on the Internet at http://www.sec.gov
that contains reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission. Such
reports, proxy statements and other information concerning Monitoring are also
filed with the National Association of Securities Dealers, Inc., as a result of
the listing of Common Stock of POI on the Nasdaq Stock Market, and may be
inspected at its offices at 1735 K Street, N.W., Washington, D.C. 20006.
 
     Whether or not the Company is obligated under the Exchange Act to file such
reports, information and documents in the future, Monitoring, while any of the
Notes remain outstanding, will furnish to the holders of the Notes and file with
the Commission (unless the Commission will not accept such a filing) (i) all
quarterly and annual financial information that would be required to be
contained in a filing with the Commission on Forms 10-Q and 10-K if the Company
were required to file such forms, including a "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and, with respect to
the annual information only, a report thereon by the Company's certified
independent accountants and (ii) all reports that would be required to be filed
with the Commission on Form 8-K if the Company were required to file such
reports. In addition, while any Notes remain outstanding, Monitoring will make
available to any holder or prospective purchaser of the Notes the information
required pursuant to Rule 144A(d)(4) promulgated under the Securities Act,
during any period in which the Company is not subject to Section 13 or 15(d) of
the Exchange Act.
 
     THIS PROSPECTUS INCORPORATES IMPORTANT BUSINESS AND FINANCIAL INFORMATION
ABOUT THE COMPANY THAT IS NOT INCLUDED IN OR DELIVERED WITH THIS DOCUMENT. SUCH
INFORMATION IS AVAILABLE WITHOUT CHARGE TO SECURITY HOLDERS UPON WRITTEN OR ORAL
REQUEST. SUCH REQUEST MUST BE MADE TO MONTGOMERY W. CORNELL, TREASURER AND
DIRECTOR OF INVESTOR RELATIONS, PROTECTION ONE, INC., 4221 WEST JOHN CARPENTER
FREEWAY, IRVING, TEXAS 75063, TELEPHONE NUMBER (972) 916-6044. TO OBTAIN TIMELY
DELIVERY, SECURITY HOLDERS MUST REQUEST THE INFORMATION NO LATER THAN FIVE
BUSINESS DAYS BEFORE THE DATE THEY MUST MAKE THEIR INVESTMENT DECISION. SUCH
INFORMATION MUST BE REQUESTED BY          , 1998.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents have been filed with the Commission and are
incorporated herein by reference:
 
          (a) The Annual Report on Form 10-K of POI and Monitoring for the
     fiscal year ended December 31, 1997; and
 
          (b) The Quarterly Reports on Form 10-Q of POI and Monitoring for the
     fiscal quarters ended March 31, 1998 and June 30, 1998.
 
     All documents filed by POI and Monitoring pursuant to Section 13(a), 13(c),
14 or 15(d) of the Exchange Act prior to the consummation of the transaction
contemplated by this Prospectus are a part of and shall be deemed to be
incorporated by reference in this Prospectus and to be a part hereof from the
date of filing such document.
 
     Any statement contained in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained herein
or in any other subsequently filed document which also is or is deemed to be
incorporated by
 
                                        i
<PAGE>   5
 
reference herein modifies or supersedes such statement. Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Prospectus. Subject to the foregoing, all
information appearing in this Prospectus is qualified in its entirety by the
information appearing in the documents incorporated by reference.
 
     POI and Monitoring will provide without charge to each person to whom this
Prospectus is delivered, upon the request of such person, a copy of any or all
the documents incorporated herein by reference, other than exhibits to such
documents (unless such exhibits are specifically incorporated by reference into
such documents). Requests for such documents should be directed to Montgomery W.
Cornell, Vice President and Treasurer, Protection One, Inc., 6225 N. Hwy. 161,
Suite 400, Irving, Texas 75038, telephone number (972) 916-6044.
 
     The public may read and copy any materials filed with the Commission by POI
and Monitoring at the Commission's Public Reference Room at 450 Fifth Street,
N.W., Washington, D.C. 20549. The public may obtain information on the operation
of the Public Reference Room by calling the Commission at 1-800-SEC-0330. The
Commission maintains an Internet site that contains reports, proxy and
information statements, and other information regarding issuers that file
electronically with the Commission at http://www.sec.gov.
 
                           FORWARD-LOOKING STATEMENTS
 
     This Prospectus and the materials incorporated by reference herein and
therein include "forward-looking statements" intended to qualify for the safe
harbor from liability established by the Private Securities Litigation Reform
Act of 1995. These forward-looking statements generally can be identified by
phrases such as the Company or its management "believes," "expects,"
"anticipates," "foresees" or other words or phrases of similar import.
Similarly, statements herein that describe the Company's business strategy,
objectives, plans, intentions or goals also are forward-looking statements. All
such forward-looking statements are subject to certain risks and uncertainties
that could cause actual results to differ materially from those in the forward-
looking statements. Important factors that could cause actual results to differ
materially from the expectations of the Company include, among others: (i) the
Company's leverage and capital structure; (ii) the impact of the Company's
acquisition strategy on its operations; (iii) the Company's need for additional
capital and history of losses; (iv) subscriber account attrition; (v) the risks
and uncertainties related to the Company's dealer program; (vi) the impact of
accounting differences for account purchases and new installations; (vii) the
possible adverse effect of false alarm ordinances and future government
regulations; (viii) risks of liability from operations; and (ix) competition in
the security alarm industry. For information with respect to these and other
factors, see "Risk Factors." Potential investors and other readers are urged to
consider these factors carefully in evaluating the forward-looking statements.
The forward-looking statements included herein are made only as of the date of
this Prospectus and the Company undertakes no obligation to publicly update such
forward-looking statements to reflect subsequent events or circumstances.
 
                              CERTAIN DEFINITIONS
 
     As used in this Prospectus, (i) "MRR" means monthly recurring revenue that
the Company is entitled to receive under contracts in effect at the end of the
referenced period, (ii) "POI" means Protection One, Inc., (iii) "Company" and
"Protection One" means, collectively, POI and its direct and indirect wholly
owned subsidiaries, and (iv) "Guarantors" means, collectively, POI, WestSec,
Inc. ("WestSec"), Westar Security, Inc. ("Westar"), Network Holdings, Inc.
("Network Holdings"), Network Multi-Family Security Corporation ("Network"), DSC
Enterprises, Inc. ("DSC"), and Comsec/Narragansett Security, Inc. ("Comsec").
 
                                       ii
<PAGE>   6
 
                               PROSPECTUS SUMMARY
 
     The following information does not purport to be complete and is qualified
in its entirety by the detailed information appearing elsewhere in this
Prospectus. Prospective investors should carefully consider the matters
discussed under the caption "Risk Factors."
 
                                  THE COMPANY
 
     Protection One is a leading provider of security alarm monitoring and
related services in the United States, with approximately 1.3 million
subscribers as of July 1998. The Company has grown rapidly by participating in
both the expansion and the consolidation of the security alarm monitoring
industry.
 
     Protection One's revenues consist primarily of recurring payments for
monitoring and related services. Protection One monitors digital signals
communicated by security systems installed at subscribers' premises. Security
systems are designed to detect burglaries, fires and other events. Through a
network of approximately 65 service branches, the Company provides repair of
security systems and, in select markets, armed response to verify that an actual
emergency has occurred.
 
     The Company provides its services to the residential, commercial and
wholesale segments of the alarm monitoring market. The Company believes the
residential segment, which represents in excess of 80% of its customer base, is
the most attractive because of its stronger growth prospects, higher gross
margins and larger potential size. Of the Company's customer base, approximately
62% reside in single-family households and approximately 19% reside in
multi-family complexes such as apartments and condominiums. Commercial
subscribers represent 12% of the customer base and subscribers served by
independent alarm dealers that subcontract monitoring services to the Company
represent 7% of the customer base. Protection One intends to grow its presence
in each of these key market segments, although the residential market remains
the most important for the Company's growth strategy.
 
RECENT DEVELOPMENTS
 
     Since November 1997, Protection One has transformed itself from a regional
company into a nationwide provider of security alarm services through a series
of significant acquisitions. The most important of these acquisitions was the
November 1997 combination with the security business of Western Resources, a
transaction that increased the Company's size by approximately 440,000
subscribers.
 
     Subsequent to the transaction consummated on November 24, 1997 in which POI
combined with WestSec, Inc., a Kansas corporation and wholly owned subsidiary of
Monitoring ("WestSec"), and Westar Security, Inc., a Kansas corporation and
direct, wholly owned subsidiary of POI ("Westar"; the "Combination") and through
June 1998, the Company used its strengthened financial position and national
infrastructure to acquire more than 500,000 subscribers, obtain a leading
position in the multi-family market segment and enter new markets in the United
Kingdom and Canada. As a result of these latest acquisitions, the Company has
further expanded its geographic reach and increased its customer density in key
markets and expects to realize operating efficiencies through the integration of
acquired operations.
 
     In June 1998, Protection One issued approximately $400 million of its
Common Stock in a concurrent public offering and private placement
(collectively, the "Equity Offerings"), using the proceeds to repay borrowings
under its Senior Credit Facility (as defined) and to repurchase a portion of its
Discount Notes. As a result of this reduction in the Company's indebtedness,
management believes the Company is well positioned to pursue further subscriber
growth over the next several years.
 
     On August 6, 1998, Protection One acquired, through a wholly-owned
subsidiary, approximately 69.4% of the outstanding shares of Compagnie
Europeenne de Telesecurite ("CET"), a French security alarm company, at a
purchase price of 450 FFR (or approximately $76.06) per share, for a total of
approximately $99.7 million. CET has approximately 60,000 subscribers and 36
branch offices, located primarily in France, as well as Belgium, Germany, the
Netherlands and Switzerland, and operates two state of the art monitoring
facilities located in Paris and Marseilles.
 
                                        1
<PAGE>   7
 
     Protection One has also initiated a public tender offer for the remaining
shares of CET, in accordance with French law, also at 450 FFR per share. The
completion of the tender offer is expected by the end of September, although
there can be no assurance that such tender offer will be completed on such terms
or at all. The acquisition of the shares of CET on August 6, 1998 and the tender
offer are hereinafter referred to as the "CET Acquisition." In connection with
the CET Acquisition, the commitment under the Senior Credit Facility was
increased to $472.8 million.
 
     The Company's principal executive offices are located at 6011 Bristol
Parkway, Culver City, California 90230, telephone (310) 342-6300.
 
                                        2
<PAGE>   8
 
                               THE EXCHANGE OFFER
 
THE EXCHANGE OFFER.........  Monitoring hereby offers, upon the terms and
                             subject to the conditions set forth in this
                             Prospectus and the Letter of Transmittal to
                             exchange $1,000 principal amount of New Notes
                             issued by Monitoring for each $1,000 principal
                             amount the Old Notes issued by Monitoring, of which
                             an aggregate principal amount of $250.0 million is
                             outstanding. The form and terms of the New Notes
                             are identical to the form and terms of the Old
                             Notes except that the New Notes have been
                             registered under the Securities Act, and will not
                             bear any legends restricting their transfer. The
                             New Notes will evidence the same debt as the Old
                             Notes and will be issued pursuant to, and entitled
                             to the benefits of, the Senior Debt Indenture
                             governing the Old Notes. The Exchange Offer is
                             being made in order to satisfy certain contractual
                             obligations of Monitoring. See "The Exchange Offer"
                             and "Description of the New Notes."
 
                             Based on an interpretation by the Commission's
                             staff set forth in no-action letters issued to
                             third parties unrelated to Monitoring and the
                             Guarantors, Monitoring and the Guarantors believe
                             that New Notes issued pursuant to the Exchange
                             Offer in exchange for Old Notes may be offered for
                             resale, sold and otherwise transferred by any
                             registered person receiving the New Notes, whether
                             or not that person is the registered holder (other
                             than any such holder or such other person that is
                             (i) an "affiliate" of Monitoring or the Guarantors
                             within the meaning of Rule 405 under the Securities
                             Act or (ii) a broker-dealer who purchased Old Notes
                             directly from Monitoring to resell pursuant to Rule
                             144A or any other available exception under the
                             Securities Act or (iii) a person participating in
                             the distribution of the New Notes), without
                             compliance with the registration and prospectus
                             delivery provisions of the Securities Act, provided
                             that (i) the New Notes are acquired in the ordinary
                             course of business of that holder or such other
                             person, (ii) neither the holder nor such other
                             person is engaging in or intends to engage in a
                             distribution of the New Notes, and (iii) neither
                             the holder nor such other person has an arrangement
                             or understanding with any person to participate in
                             the distribution of the New Notes. See "The
                             Exchange Offer -- Purpose and Effect." Each
                             broker-dealer that receives New Notes for its own
                             account in exchange for Old Notes, where those Old
                             Notes were acquired by the broker-dealer as a
                             result of its market-making activities or other
                             trading activities, must acknowledge that it will
                             deliver a prospectus in connection with any resale
                             of these New Notes. See "Plan of Distribution."
 
REGISTRATION RIGHTS
AGREEMENT..................  The Old Notes were sold by Monitoring on August 17,
                             1998, in a private placement in reliance on Section
                             4(2) of the Securities Act and immediately resold
                             by the initial purchasers thereof in reliance on
                             Rule 144A under the Securities Act. In connection
                             with the sale, Monitoring and the Guarantors
                             entered into a Registration Rights Agreement with
                             the initial purchasers of the Old Notes (the
                             "Registration Rights Agreement") requiring
                             Monitoring and the Guarantors to make the Exchange
                             Offer. The Registration Rights Agreement further
                             provides that Monitoring and the Guarantors must
                             use their reasonable best efforts to (i) cause the
                             Registration Statement with respect to the Exchange
                             Offer to be declared effective on or before
                             December 15, 1998 and (ii) consummate the Exchange
                             Offer on or before the 45th business day following
                             the date on which the Registration Statement is
                             declared
 
                                        3
<PAGE>   9
 
                             effective. See "The Exchange Offer -- Purpose and
                             Effect." If such registration requirements are not
                             complied with by the applicable deadlines,
                             Monitoring and the Guarantors must pay liquidated
                             damages ("Liquidated damages") to the holders of
                             Transfer Restricted Securities (as defined) as set
                             forth in the Registration Rights Agreement.
 
EXPIRATION DATE............  The Exchange Offer will expire at 5:00 p.m., New
                             York City time,             , 1998 (the
                             twenty-first day following the initiation of the
                             Exchange Offer) or such later date and time to
                             which it is extended by Monitoring and the
                             Guarantors.
 
WITHDRAWAL.................  The tender of the Old Notes pursuant to the
                             Exchange Offer may be withdrawn at any time prior
                             to 5:00 p.m., New York City time, on the Expiration
                             Date. Any Old Notes not accepted for exchange for
                             any reason will be returned without expense to the
                             tendering holder thereof as promptly as practicable
                             after the expiration or termination of the Exchange
                             Offer.
 
INTEREST ON THE NEW NOTES
AND THE OLD NOTES..........  Interest on each New Note will accrue from the date
                             of issuance of the Old Note for which the New Note
                             is exchanged or from the date of the last periodic
                             payment of interest on such Old Note, whichever is
                             later. No additional interest will be paid on Old
                             Notes tendered and accepted for exchange.
 
CONDITIONS TO THE EXCHANGE
  OFFER....................  The Exchange Offer is subject to certain customary
                             conditions, certain of which may be waived by
                             Monitoring. See "The Exchange Offer -- Conditions
                             to Exchange Offer."
 
PROCEDURES FOR TENDERING
OLD NOTES..................  Each holder of the Old Notes wishing to accept the
                             Exchange Offer must complete, sign and date the
                             Letter of Transmittal, or a copy thereof, in
                             accordance with the instructions contained herein
                             and therein, and mail or otherwise deliver the
                             Letter of Transmittal, or the copy, together with
                             the Old Notes and any other required documentation,
                             to the Exchange Agent (as defined) at the address
                             set forth herein. Persons holding the Old Notes
                             through the Depository Trust Company ("DTC") and
                             wishing to accept the Exchange Offer must do so
                             pursuant to the DTC's Automated Tender Offer
                             Program ("ATOP"), by which each tendering
                             participant will agree to be bound by the Letter of
                             Transmittal. By executing or agreeing to be bound
                             by the Letter of Transmittal, each holder will
                             represent to Monitoring and the Guarantors that,
                             among other things, (i) the New Notes acquired
                             pursuant to the Exchange Offer are being obtained
                             in the ordinary course of business of the person
                             receiving such New Notes, whether or not such
                             person is the registered holder of the Old Notes,
                             (ii) neither the holder nor any such other person
                             is engaging in or intends to engage in a
                             distribution of such New Notes, (iii) neither the
                             holder nor any such other person has an arrangement
                             or understanding with any person to participate in
                             the distribution of such New Notes, and (iv)
                             neither the holder nor any such other person is an
                             "affiliate," as defined under Rule 405 promulgated
                             under the Securities Act, of Monitoring or the
                             Guarantors. Pursuant to the Registration Rights
                             Agreement if (i) Monitoring determines that it is
                             not permitted to effect the Exchange Offer as
                             contemplated hereby
 
                                        4
<PAGE>   10
 
                             because of any applicable law or Commission policy,
                             or (ii) any holder of Transfer Restricted
                             Securities (as defined) notifies Monitoring prior
                             to the 20th day following consummation of the
                             Exchange Offer (a) that it is prohibited by law or
                             Commission policy from participating in the
                             Exchange Offer (b) that it may not resell the New
                             Notes acquired by it in the Exchange Offer to the
                             public without delivering a prospectus and that
                             this Prospectus is not appropriate or available for
                             such resales or (c) that it is a broker-dealer and
                             owns Old Notes acquired directly from Monitoring or
                             an affiliate of Monitoring, Monitoring is required
                             to file a "shelf" registration statement for a
                             continuous offering pursuant to Rule 415 under the
                             Securities Act in respect of the Old Notes.
 
                             Monitoring will accept for exchange any and all Old
                             Notes which are properly tendered (and not
                             withdrawn) in the Exchange Offer prior to 5:00
                             p.m., New York City time, on the Expiration Date.
                             The New Notes issued pursuant to the Exchange Offer
                             will be delivered promptly following the Expiration
                             Date. See "The Exchange Offer -- Terms of the
                             Exchange Offer."
 
EXCHANGE AGENT.............  The Bank of New York is serving as Exchange Agent
                             (the "Exchange Agent") in connection with the
                             Exchange Offer.
 
FEDERAL INCOME TAX
  CONSIDERATIONS...........  The exchange pursuant to the Exchange Offer should
                             not be a taxable event for federal income tax
                             purposes. See "Certain Federal Income Tax
                             Considerations."
 
EFFECT OF NOT TENDERING....  Old Notes that are not tendered or that are
                             tendered but not accepted will, following the
                             completion of the Exchange Offer, continue to be
                             subject to the existing restrictions upon transfer
                             thereof. Monitoring and the Guarantors will have no
                             further obligation to provide for the registration
                             under the Securities Act of such Old Notes.
 
                                 THE NEW NOTES
 
ISSUER.............................    Protection One Alarm Monitoring, Inc.
 
SECURITIES OFFERED.................    $250,000,000 aggregate principal amount
                                       of 7 3/8% Senior Notes due 2005.
 
MATURITY...........................    August 15, 2005.
 
INTEREST PAYMENT DATES.............    February 15 and August 15 of each year,
                                       commencing on February 15, 1999.
 
GUARANTEES.........................    The New Notes will be fully and
                                       unconditionally guaranteed on a senior
                                       unsecured basis by the Guarantors. The
                                       Guarantees will be unsecured and will
                                       rank pari passu with all other unsecured
                                       and unsubordinated indebtedness of the
                                       respective Guarantors. See "Description
                                       of the New Notes -- General" and
                                       "-- Certain Covenants -- Subsidiary
                                       Guarantees."
 
RANKING............................    The New Notes will be general unsecured
                                       obligations of Monitoring and will rank
                                       pari passu in right of payment with all
                                       senior indebtedness, whenever incurred,
                                       of Monitoring, including that certain
                                       credit agreement, as
 
                                        5
<PAGE>   11
 
                                       amended to date, between the Company and
                                       Westar Capital (the "Senior Credit
                                       Facility"), and senior in right of
                                       payment to all subordinated indebtedness,
                                       whenever incurred, of Monitoring,
                                       including the Discount Notes and the
                                       Convertible Notes. See "Description of
                                       the New Notes -- General."
 
OPTIONAL REDEMPTION................    The New Notes will be redeemable, in
                                       whole or in part, at the option of
                                       Monitoring at any time and from time to
                                       time at a redemption price equal to the
                                       Make-Whole Price. See "Description of the
                                       New Notes -- Optional Redemption."
 
SINKING FUND.......................    None.
 
CHANGE OF CONTROL..................    Upon the occurrence of a Change of
                                       Control Triggering Event, each holder of
                                       the New Notes will have the right to
                                       require Monitoring to repurchase such
                                       holders' New Notes, in whole or in part,
                                       at a price equal to 101% of the aggregate
                                       principal amount thereof, plus accrued
                                       and unpaid interest to the date of
                                       purchase. In the event that at any time
                                       (i) both Rating Agencies (as defined)
                                       assign the New Notes an Investment Grade
                                       Rating (as defined) and (ii) no Default
                                       (as defined) or Event of Default (as
                                       defined) has occurred and is continuing
                                       under the indenture governing the Notes
                                       (the "Senior Debt Indenture"), the
                                       provisions of the Senior Debt Indenture
                                       with respect to a Change of Control
                                       Triggering Offer (as defined) will be
                                       permanently terminated.
 
COVENANTS..........................    The Senior Debt Indenture contains
                                       certain covenants, including but not
                                       limited to, (i) restrictions on the
                                       creation of liens securing indebtedness
                                       and (ii) limitations on sale and
                                       leaseback transactions.
 
                                  RISK FACTORS
 
     The risk factors that holders of Old Notes should consider in connection
with the Exchange Offer and that prospective investors in the New Notes should
consider include, but are not limited to: (i) consequences of the failure to
exchange the Old Notes, (ii) the Company's leverage, (iii) the impact of the
Company's acquisition strategy on operations, (iv) the attrition of subscriber
accounts, (v) the Company's history of losses, (vi) the control of the Company
by Western Resources (as defined) and Westar Capital (as defined), (vii) the
Company's need for additional capital, (viii) the risk related to the Dealer
Program, (ix) the possible adverse effect of "false alarm" ordinances, (x) the
possible effect of future government regulations and the risk of litigation,
(xi) the liability from the Company's operations, (xii) the impact of accounting
differences for account purchases and new installations, (xiii) the Company's
competition, (xix) the impact of declines in new construction of multi-family
dwellings, (xv) the impact of the year 2000 issue, (xvi) the repurchase of the
Notes upon a change of control triggering event, (xvii) the risks arising under
bankruptcy laws, and (xviii) the absence of a public market for the Notes.
 
                                        6
<PAGE>   12
 
                                  RISK FACTORS
 
     Prospective investors should carefully consider the risk factors set forth
below, as well as the other information set forth in this Prospectus, before
making an investment in the New Notes. This Prospectus contains forward-looking
statements which involve risks and uncertainties. The Company's actual results
may differ significantly from the results discussed in the forward-looking
statements. Factors that might cause such differences include, but are not
limited to, the risk factors set forth below.
 
CONSEQUENCES OF FAILURE TO EXCHANGE OLD NOTES
 
     Holders of Old Notes who do not exchange their Old Notes for New Notes
pursuant to the Exchange Offer will continue to be subject to the provisions in
the Indenture regarding transfer and exchange of the Old Notes and the
restrictions on transfer of such Old Notes as set forth in the legend thereon as
a consequence of the issuance of the Old Notes pursuant to exemptions from, or
in transactions not subject to, the registration requirements of the Securities
Act and applicable state securities laws. In general, the Old Notes may not be
offered or sold, unless registered under the Securities Act and applicable state
securities laws. Monitoring does not currently anticipate that it will register
Old Notes under the Securities Act. See "The Exchange Offer -- Purpose and
Effect." Based on interpretations by the staff of the Commission, as set forth
in no-action letters issued to third parties, Monitoring believes that New Notes
issued pursuant to the Exchange Offer in exchange for Old Notes may be offered
for resale, resold or otherwise transferred by holders thereof (other than any
such holder which is an "affiliate" of Monitoring within the meaning of Rule 405
under the Securities Act) without compliance with the registration and
prospectus delivery provisions of the Securities Act, provided that such New
Notes are acquired in the ordinary course of such holders' business and such
holders, other than broker-dealers, have no arrangement or understanding with
any person to participate in the distribution of such New Notes. However, the
Commission has not considered the Exchange Offer in the context of a no-action
letter and there can be no assurance that the staff of the Commission would make
a similar determination with respect to the Exchange Offer as in such other
circumstances. Each holder, other than a broker-dealer, must acknowledge that it
is not engaged in, and does not intend to engage in, a distribution of such New
Notes and has no arrangement or understanding to participate in a distribution
of New Notes. If any holder is an affiliate of Monitoring or the Guarantors or
is engaged in or intends to engage in or has any arrangement or understanding
with respect to the distribution of the New Notes to be acquired pursuant to the
Exchange Offer, such holder (i) may not rely on the applicable interpretations
of the staff of the Commission and (ii) must comply with the registration and
prospectus delivery requirements of the Securities Act in connection with any
resale transaction. Each broker-dealer that receives New Notes for its own
account in exchange for Old Notes pursuant to the Exchange Offer must
acknowledge that such Old Notes were acquired by such broker-dealer as a result
of market-making activities or other trading activities and that it will deliver
a prospectus in connection with any resale of such New Notes. The Letter of
Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of New Notes received in exchange for Old Notes where such Old
Notes were acquired by such broker-dealer as a result of market-making
activities or other trading activities. In addition, to comply with the
securities laws of certain jurisdictions, if applicable, the New Notes may not
be offered or sold unless they have been registered or qualified for sale in
such jurisdictions or an exemption from registration or qualification is
available and is complied with. Monitoring and the Guarantors have agreed,
pursuant to the Registration Rights Agreement, subject to certain limitations
specified therein, to cooperate with the holders to register or qualify the New
Notes for offer or sale under the securities laws of such jurisdiction as any
holder reasonably requests. Unless a holder so requests, Monitoring does not
currently intend to register or qualify the sale of the New Notes in any such
jurisdictions. See "The Exchange Offer."
 
                                        7
<PAGE>   13
 
LEVERAGE
 
     The Company has substantial indebtedness. As of June 30, 1998, on a pro
forma basis after giving effect to the offering of the Old Notes (the
"Offering") (and the use of the proceeds therefrom), as though all such events
had occurred at such date, the Company would have had approximately $544.0
million of indebtedness outstanding, and there would have been approximately
$283.5 million available for future borrowings under the Senior Credit Facility.
Subsequent to June 30, 1998, the commitment under the Senior Credit Facility was
increased from $292.8 million to $472.8 million in connection with the
acquisition of approximately 69.4% of the outstanding shares of CET. For the six
months ended June 30, 1998 and the year ended December 31, 1997, earnings were
insufficient to cover fixed charges by $2.1 million and $82.3 million,
respectively. The Company may incur additional indebtedness in the future,
subject to certain limitations contained and to be contained in the various
indentures and credit agreements governing the Company's outstanding
indebtedness, and expects to do so in order to fund future additions of
subscriber accounts through purchases in connection with the Dealer Program and
future acquisitions of subscriber account portfolios as part of its business
strategy. To the extent the Company will need to rely on funds under the Senior
Credit Facility beyond its current maturity of March 30, 1999, the Company
believes that it will be able to obtain further extensions of the maturity date
of the Senior Credit Facility from time to time, or will be able to refinance
the Senior Credit Facility prior to its present maturity date, although there
can be no assurance that the Company will be able to do so. A portion of the
consolidated debt of the Company bears interest at floating rates; therefore,
the financial results of the Company are and will continue to be affected by
changes in prevailing interest rates. As of July 31, 1998, the Company had
approximately $304.7 million of debt outstanding bearing interest at floating
interest rates.
 
     The Company's degree of leverage may have important consequences to holders
of the New Notes, including the following: (i) the Company's ability to obtain
additional financing in the future for working capital, the Dealer Program,
acquisitions of portfolios of subscriber accounts, capital expenditures, general
corporate purposes or other purposes may be impaired; (ii) the indenture under
which Monitoring's Discount Notes were issued (the "Discount Notes Indenture"),
the indenture under which the Convertible Notes were issued (the "Convertible
Notes Indenture") and the Senior Credit Facility contain, and are expected to
continue to contain, certain restrictive covenants, including covenants under
the Senior Credit Facility that require the Company to obtain the consent of the
lenders under the Senior Credit Facility to certain actions by the Company and
to maintain certain financial ratios in order to undertake significant
acquisitions of portfolios of subscriber accounts, all of which may impose
limitations on the Company's ability to execute its business strategy; (iii) the
Company may be more vulnerable to a downturn in the Company's business or the
economy generally; and (iv) the Company's ability to compete against other less
leveraged companies may be adversely affected.
 
IMPACT OF ACQUISITION STRATEGY ON OPERATIONS
 
     A principal element of the Company's business strategy is to grow rapidly
by acquiring portfolios of alarm monitoring accounts. During the 1992-1997
period, acquisitions were the primary source of the Company's growth; however,
the Dealer Program has become an increasingly important component of the
Company's growth. Since November 1997, Protection One has completed 20
transactions, thereby adding approximately 1.0 million subscribers. The
Combination and subsequent acquisitions have placed and will continue to place
substantial demands on the Company's management, operational resources and
financial and internal control systems. The Company's future operating results
will depend in part on the Company's ability to continue to implement and
improve the Company's operating and financial controls and to expand, train and
manage the Company's employee base. Significant changes in quarterly revenues
and costs may result from the Company's execution of its business strategy,
resulting in fluctuating financial results. Additionally, management of growth
may limit the time available to the Company's management to attend to other
operational, financial and strategic issues. Moreover, due to the continuing
consolidation of the security alarm monitoring industry and the acquisition by
the Company and other alarm companies of a number of large portfolios of
subscriber accounts, there may in the future be fewer large portfolios of
subscriber accounts available for acquisition. The Company faces competition for
the acquisition of portfolios of subscriber accounts, and may
 
                                        8
<PAGE>   14
 
be required to offer higher prices for subscriber accounts it acquires in the
future than the Company has in the past. See "-- Competition." There can be no
assurance that the Company will be able to find acceptable acquisition
candidates or, if such candidates are identified, that acquisitions can be
consummated on terms acceptable to the Company.
 
     Acquisitions of portfolios of subscriber accounts involve a number of
risks, including the possibility of unanticipated problems not discovered prior
to the acquisition, higher than expected account attrition and the diversion of
management's attention from other business activities in order to focus on the
integration of accounts. For acquisitions that are structured as stock purchases
of other companies, the Company may assume unexpected liabilities and must
dispose of unnecessary or undesirable assets of the acquired companies. Because
the Company's primary consideration in acquiring a portfolio of subscriber
accounts is the MRR associated with the purchased accounts, the price paid by
the Company is customarily directly tied to such MRR. The price paid varies
based on the number and quality of accounts being purchased from the seller, the
historical activity of such accounts and other factors. The seller typically
does not have audited historical financial information with respect to the
acquired accounts. In making acquisition decisions, the Company generally has
relied on management's knowledge of the industry, due diligence procedures and
representations and warranties of the sellers. There can be no assurance that
such representations and warranties are true and complete or, if such
representations and warranties are inaccurate, that the Company will be able to
uncover such inaccuracies in the course of its due diligence or recover damages
from the seller in an amount sufficient to fully compensate the Company for any
resulting losses. The Company expects that future acquisitions will present at
least the same risks to the Company as its prior acquisitions.
 
     An important aspect of the Company's acquisition program is the integration
of subscriber accounts into the Company's operations after purchase. Depending
on the size, frequency and location of acquisitions, the integration of
subscribers may adversely affect the provision of field repair services to
existing subscribers, which may cause subscriber attrition to increase. In
addition, if the Company's corporate or branch operations fail to integrate a
substantial portion of or do not adequately service acquired subscriber
accounts, the Company may experience higher attrition in the future.
 
ATTRITION OF SUBSCRIBER ACCOUNTS
 
     The Company experiences attrition of subscriber accounts as a result of,
among other factors, relocation of subscribers, adverse financial and economic
conditions, and competition from other alarm service companies. In addition, the
Company experiences attrition of newly acquired accounts to the extent the
Company does not integrate such accounts or does not adequately service those
accounts. An increase in attrition rates could have a material adverse effect on
the Company's revenues and earnings.
 
     When acquiring accounts, the Company seeks to withhold a portion of the
purchase price as a partial reserve against excess subscriber attrition. If the
actual attrition rate for the accounts acquired is greater than the rate assumed
by the Company at the time of the acquisition, and the Company is unable to
recoup its damages from the portion of the purchase price held back from the
seller, such attrition could have a material adverse effect on the Company's
business, financial condition, results of operations, prospects or ability to
service their debt obligations, including the Notes. There can be no assurance
that the Company will be able to obtain purchase price holdbacks in future
acquisitions, particularly acquisitions of large portfolios. The Company has no
assurance that actual account attrition for acquired accounts will not be
greater than the attrition rate assumed or historically incurred by the Company.
In addition, because some acquired accounts are prepaid on an annual, semiannual
or quarterly basis, attrition may not become evident for some time after an
acquisition is consummated.
 
     As of June 30, 1998, the cost of intangible assets, net of previously
accumulated amortization, was $1.9 billion, which constituted approximately
90.1% of the book value of the Company's total assets. The Company's purchased
subscriber accounts are amortized on a straight-line basis over the estimated
life of the related revenues (generally ten years) and goodwill is amortized
over a 40 year life. The effects of gross subscriber attrition has historically
been offset by adding new accounts from subscribers who move into premises
previously occupied by prior subscribers and in which security alarm systems are
installed,
 
                                        9
<PAGE>   15
 
conversions of accounts that were previously monitored by other alarm companies
to the Company's monitoring services and accounts for which the Company obtains
a guarantee from the seller that provides for the Company to "put" back to the
seller canceled accounts. The resulting figure is used as a guideline to
determine the estimated life of subscriber revenues. It is the Company's policy
to review periodically actual account attrition and, when necessary, adjust the
remaining estimated lives of the Company's purchased accounts to reflect assumed
future attrition. There could be a material adverse effect on the Company's
business, financial condition, results of operations, prospects or ability to
service their debt obligations, including the Notes if actual account attrition
significantly exceeds assumed attrition and the Company has to shorten the
period over which it amortizes the cost of purchased subscriber accounts.
 
HISTORY OF LOSSES
 
     The Company incurred a net loss of $49.3 million in 1997 and a net loss of
$0.7 million in 1996, and Westinghouse Security (a predecessor of the Company
for accounting purposes) reported net losses of $4.9 million, $5.9 million, $1.8
million and $9.2 million in fiscal 1996, 1995, 1994 and 1993, respectively.
These losses reflect, among other factors, substantial charges incurred by the
Company and Westinghouse Security for amortization of purchased subscriber
accounts, interest incurred on indebtedness and non-recurring charges. Such
charges, with the exception of the non-recurring charges, will increase as the
Company continues to purchase subscriber accounts, if the Company's indebtedness
increases, or if interest rates increase. The Company's earnings have been
insufficient to cover its fixed charges since the Company was formed, and there
can be no assurance that the Company will attain profitable operations on an
annual basis or at all.
 
CONTROL BY WESTERN RESOURCES
 
     Western Resources, Inc., a Kansas corporation ("Western Resources"),
through Westar Capital, Inc., a wholly owned subsidiary of Western Resources
("Westar Capital"), currently owns approximately 85% of the outstanding Common
Stock of POI. As long as Westar Capital continues to beneficially own in excess
of 50% of the shares of Common Stock outstanding, Westar Capital will be able to
direct the election of all directors of POI and exercise a controlling influence
over the business and affairs of POI, including any determinations with respect
to mergers or other business combinations involving POI, the acquisition or
disposition of assets by POI and the incurrence of indebtedness by POI.
 
NEED FOR ADDITIONAL CAPITAL
 
     The Company's purchases of subscriber accounts through the Dealer Program
and acquisitions of portfolios of subscriber accounts have generated cash needs
that exceed the Company's net cash provided by operating activities. The Company
intends to continue to pursue subscriber account growth through the Dealer
Program and acquisitions. As a result, the Company will be required to seek
additional funding from additional borrowings under the Senior Credit Facility
or a successor credit facility and the sale of additional securities in the
future, which may lead to higher leverage. See "-- Leverage." Any inability of
the Company to obtain funding through external financing is likely to adversely
affect the Company's ability to increase its subscribers, revenues and cash
flows from operations. There can be no assurance that external funding will be
available to the Company on terms considered favorable by the Company or at all.
 
RISKS RELATED TO THE DEALER PROGRAM
 
     During 1995-1997, the Company's Dealer Program became an increasingly
important source of growth for the Company. The Company expects that this
emphasis will continue. Several of the Company's competitors also have or are
initiating dealer programs, and there can be no assurance that the Company will
be able to retain or expand its current dealer base or that competitive offers
to the Company's dealers will not require the Company to pay higher prices to
the Company's dealers for subscriber accounts than previously paid.
 
                                       10
<PAGE>   16
 
POSSIBLE ADVERSE EFFECT OF "FALSE ALARM" ORDINANCES
 
     According to the Company's experience and industry data, substantially all
alarm activations that result in the dispatch of police or fire department
personnel are not emergencies, and thus are "false alarms." Significant concern
has arisen in certain municipalities about this high incidence of false alarms.
This concern could cause a decrease in the likelihood or timeliness of police
response to alarm activations and thereby decrease the propensity of consumers
to purchase or maintain alarm monitoring services.
 
     A number of local governmental authorities have considered or adopted
various measures aimed at reducing the number of false alarms. Such measures
include (i) subjecting alarm monitoring companies to fines or penalties for
transmitting false alarms, (ii) licensing individual alarm systems and the
revocation of such licenses following a specified number of false alarms, (iii)
imposing fines on alarm subscribers for false alarms, (iv) imposing limitations
on the number of times the police will respond to alarms at a particular
location after a specified number of false alarms, and (v) requiring further
verification of an alarm signal before the police will respond. Enactment of
such measures could adversely affect the Company's future business and
operations.
 
POSSIBLE ADVERSE EFFECT OF FUTURE GOVERNMENT REGULATIONS; RISKS OF LITIGATION
 
     The Company's operations are subject to a variety of laws, regulations and
licensing requirements of federal, state and local authorities. In certain
jurisdictions, the Company is required to obtain licenses or permits, to comply
with standards governing employee selection and training, and to meet certain
standards in the conduct of the Company's business. The loss of such licenses,
or the imposition of conditions to the granting or retention of such licenses,
could have a material adverse effect on the Company's business, financial
condition, results of operations, prospects or ability to service their debt
obligations, including the Notes.
 
     The Company's advertising and sales practices are regulated by both the
Federal Trade Commission and state consumer protection laws. Such regulations
include restrictions on the manner in which the Company promotes the sale of
security alarm systems and the obligation of the Company to provide purchasers
of alarm systems with certain rescission rights. While the Company believes that
it has complied with these regulations in all material respects, there can be no
assurance that none of these regulations was violated in connection with the
solicitation of the Company's existing subscriber accounts, particularly with
respect to accounts acquired from third parties, or that no such violation will
occur in the future.
 
LIABILITY FROM OPERATIONS
 
     The nature of the services provided by the Company potentially exposes it
to greater risks of liability for employee acts or omissions or system failure
than may be inherent in other businesses. Most of the Company's alarm monitoring
agreements and other agreements pursuant to which the Company sells its products
and services contain provisions limiting liability to subscribers in an attempt
to reduce this risk. However, in the event of litigation with respect to such
matters, there can be no assurance that these limitations will be enforced, and
the costs of such litigation could have a material adverse effect on the
Company.
 
     The Company's alarm response and patrol services require Company personnel
to respond to emergencies that may entail risk of harm to such employees and to
others. In most cities in which the Company provides such services, the
Company's patrol officers carry firearms, which may increase such risk. Although
the Company screens and trains its employees, the provision of alarm response
service subjects the Company to greater risks related to accidents or employee
behavior than other types of businesses. Reduction of police participation in
the handling of emergencies could expose the Company's patrol officers to
greater hazards and further increase the Company's risk of liability.
 
     The Company carries insurance of various types, including general liability
and errors and omissions insurance. The loss experience of the Company and other
security service companies may affect the availability and cost of such
insurance. Certain of the Company's insurance policies and the laws of some
 
                                       11
<PAGE>   17
 
states may limit or prohibit insurance coverage for punitive or certain other
types of damages, or liability arising from gross negligence.
 
IMPACT OF ACCOUNTING DIFFERENCES FOR ACCOUNT PURCHASES AND NEW INSTALLATIONS
 
     A difference between the accounting treatment of the purchase of subscriber
accounts (including both purchases of subscriber account portfolios and
purchases under ongoing agreements with independent alarm dealers) and the
accounting treatment of the generation of subscriber accounts through direct
sales by the Company's sales force has a significant impact on the Company's
results of operations. All direct external costs associated with purchases of
subscriber accounts are capitalized and amortized over 10 years on a
straight-line basis. Also included in capitalized costs are certain acquisition
transition costs that reflect the Company's estimate of costs associated with
incorporating the purchased subscriber accounts into the Company's operations.
Such costs include costs incurred by the Company in fulfilling the seller's pre-
acquisition obligations to the acquired subscribers, such as providing warranty
repair services. In contrast, the Company's costs related to the sales and
marketing of new alarm monitoring systems generated by the Company's sales
force, as well as indirect overhead incurred in support of such activities, are
expensed in the period in which such activities occur. The Company's sales,
marketing and indirect overhead expenses for new systems generally exceed
installation revenues. The Company has recently converted the internal sales
force of WestSec and Westar into independent dealers participating in the Dealer
Program.
 
     There can be no assurance that the Company will not increase its emphasis
on the marketing and sales of new alarm system installations in the future,
however, particularly in connection with a joint venture or other strategic
alliance. Any such increase could have a material adverse effect on reported
results.
 
COMPETITION
 
     The security alarm industry is highly competitive and highly fragmented.
The Company competes with major firms with substantial financial resources,
including ADT Operations Inc., a subsidiary of Tyco International, Inc.; the
security subsidiaries of the Ameritech Corporation; and Brinks Home Security
Inc., a subsidiary of The Pittston Services Group. Other alarm service companies
have adopted a strategy similar to the Company's that entails the aggressive
purchase of alarm monitoring accounts both through acquisitions of account
portfolios and through dealer programs. Some competitors have greater financial
resources than the Company, or may be willing to offer higher prices than the
Company is prepared to offer, to purchase subscriber accounts. The effect of
such competition may be to reduce the purchase opportunities available to the
Company, thus reducing the Company's rate of growth, or to increase the price
paid by the Company for subscriber accounts, which could have a material adverse
effect on the Company's return on investment in such accounts and the Company's
results of operations.
 
IMPACT OF DECLINES IN NEW CONSTRUCTION OF MULTI-FAMILY DWELLINGS
 
     Demand for alarm monitoring services in the multi-family alarm monitoring
market is tied to the construction of new multi-family structures. The Company
believes that developers of multi-family dwellings view the provision of alarm
monitoring services as an added feature that can be used in marketing newly
developed condominiums, apartments and other multi-family structures.
Accordingly, the Company anticipates that the growth in the multi-family alarm
monitoring market will continue so long as there is a demand for new
multi-family dwellings. However, the real estate market in general is cyclical
and, in the event of a decline in the market for new multi-family dwellings, it
is likely that demand for the Company's alarm monitoring services to
multi-family dwellings would also decline, which could negatively impact the
Company's results of operations.
 
IMPACT OF YEAR 2000 ISSUE
 
     An issue exists for all companies that rely on computers as the year 2000
approaches. The "Year 2000" problem is the result of the past practice in the
computer industry of using two digits rather than four to identify the
applicable year. This practice will result in incorrect results when computers
perform arithmetic
 
                                       12
<PAGE>   18
 
operations, comparisons or data field sorting involving years later than 1999.
The Company is reviewing its computer and signal processing to identify and
correct any components that could be affected by the change of the date to
January 1, 2000 (the "Year 2000 Issue"). The Company will continue its review
until January 1, 2000, particularly with respect to acquisition of security
businesses that include additional computer systems and equipment. In addition,
changes in the state of compliance or preparedness within companies that provide
services or equipment to the Company will require the Company to continue its
evaluation. Based on its on-going review, management believes the Year 2000
Issue does not pose material operational problems and estimates the costs
associated with the assessment of risk and the execution of corrective action to
be approximately $4.0 million.
 
REPURCHASE OF THE NOTES UPON A CHANGE OF CONTROL TRIGGERING EVENT
 
     Upon a Change of Control Triggering Event, the holders of the Notes will
have the right to require Monitoring to repurchase such holders' Notes, in whole
or in part, at a price equal to 101% of the principal amount thereof, plus
accrued and unpaid interest and Liquidated Damages thereon, if any, to the date
of purchase. If a Change of Control Triggering Event were to occur, Monitoring
may not have the financial resources to repurchase all of the Notes and repay
any other indebtedness that would become payable upon the occurrence of such
Change of Control Triggering Event. The Change of Control purchase feature of
the Notes may in certain circumstances discourage or make more difficult a sale
or takeover of Monitoring and/or POI. See "Description of the New
Notes -- Certain Covenants -- Change of Control."
 
FRAUDULENT CONVEYANCE
 
     Under applicable provisions of federal bankruptcy law or comparable
provisions of state fraudulent transfer law, if, among other things, Monitoring
or any Guarantor, at the time it incurred the indebtedness evidenced by the
Notes or its Guarantee, (i) (a) was or is insolvent or rendered insolvent by
reason of such occurrence of (b) was or is engaged in a business or transaction
for which the assets remaining with Monitoring or such Guarantor constituted
unreasonably small capital or (c) intended or intends to incur, or believed or
believes that it would incur, debts beyond its ability to pay such debts as they
mature, and (ii) Monitoring or such Guarantor received or receives less than
reasonably equivalent value or fair consideration for the incurrence of such
indebtedness, then the Notes and the Guarantees could be voided, or claims in
respect of the Notes or the Guarantees could be subordinated to all other debts
of Monitoring or such Guarantor, as the case may be. In addition, the payment of
interest and principal by Monitoring pursuant to the Notes or the payment of
amounts by a Guarantor pursuant to its Guarantee could be voided and required to
be returned to the person making such payment, or to a fund for the benefit of
the creditors of Monitoring or such Guarantor, as the case may be.
 
     The measures of insolvency for purposes of the foregoing considerations
will vary depending upon the law applied in any proceeding with respect to the
foregoing. Generally, however, Monitoring or a Guarantor would be considered
insolvent if (i) the sum of its debts, including contingent liabilities, were
greater than the saleable value of all of its assets at a fair valuation or if
the present fair saleable value of its assets were less than the amount that
would be required to pay its probable liability on its existing debts, including
contingent liabilities, as they become absolute and mature or (ii) it could not
pay its debts as they become due. There can be no assurance, however, as to what
standard a court would apply in making such determinations or that a court would
agree with the Monitoring's or the Guarantors' conclusions in this regard.
 
ABSENCE OF PUBLIC MARKET FOR THE NOTES
 
     The New Notes are being offered to the holders of the Old Notes. The New
Notes constitute a new class of securities with no established trading market.
To the extent that Old Notes are tendered and accepted in the Exchange Offer,
the trading market for the remaining untendered Old Notes could be adversely
affected. There is no existing trading market for the New Notes, and there can
be no assurance regarding the future development of a market for the New Notes,
or the ability of holders of the New Notes to sell their New Notes or the price
at which such holders may be able to sell their New Notes. If such a market were
to develop, the New Notes could trade at prices that may be higher or lower than
their principal amount or
                                       13
<PAGE>   19
 
purchase price, depending on many factors, including prevailing interest rates,
the Company's operating results and the market for similar securities. Each of
Bear, Stearns & Co. Inc., Lehman Brothers, Inc., Morgan Stanley & Co.
Incorporated and Salomon Brothers Inc. (collectively, the "Initial Purchasers")
has advised Monitoring that it currently intends to make a market in the New
Notes. The Initial Purchasers are not obligated to do so, however, and any
market-making with respect to the New Notes may be discontinued at any time
without notice. Therefore, there can be no assurance as to the liquidity of any
trading market for the New Notes or that an active public market for the New
Notes will develop. Monitoring does not intend to apply for listing or quotation
of the New Notes on any securities exchange or stock market.
 
     Historically, the market for noninvestment grade debt has been subject to
disruptions that have caused substantial volatility in the prices of such
securities. There can be no assurance that the market for the New Notes will not
be subject to similar disruptions. Any such disruptions may have an adverse
effect on holders of the New Notes.
 
                  RATIO OF EARNINGS TO COMBINED FIXED CHARGES
 
     In calculating the ratio of earnings to fixed charges, earnings consist of
income before income taxes plus fixed charges. Fixed charges consist of interest
expense and the component of rental expense believed by management to be
representative of the interest factor thereon. Earnings were insufficient to
cover fixed charges by approximately $82.3 million and $1.0 million for the
Company during the years ended December 31, 1997 and 1996, respectively. For the
Company's predecessor, earnings were insufficient to cover fixed charges by
approximately $7.8 million for the 53 weeks ended December 30, 1996, $9.6
million for the 52 weeks ended December 20, 1995, $2.8 million for the 52 weeks
ended December 20, 1994, and $14.8 million for the 52 weeks ended December 16,
1993.
 
                                       14
<PAGE>   20
 
                               THE EXCHANGE OFFER
 
PURPOSE AND EFFECT
 
     The Old Notes were sold by Monitoring on August 17, 1998 in the Offering.
In connection with that placement, Monitoring entered into the Registration
Rights Agreement, which requires that Monitoring file the Registration Statement
under the Securities Act with respect to the New Notes and, upon the
effectiveness of that Registration Statement, offer to the holders of the Old
Notes the opportunity to exchange their Old Notes for a like principal amount of
New Notes, which will be issued without a restrictive legend and which generally
may be reoffered and resold by the holder without registration under the
Securities Act. The Registration Rights Agreement further provides that
Monitoring must use its reasonable best efforts to (i) cause the Registration
Statement with respect to the Exchange Offer to be declared effective on or
before December 15, 1998 and (ii) consummate the Exchange Offer on or before the
45th business day following the date on which the Registration Statement is
declared effective. Except as provided below, upon the completion of the
Exchange Offer, Monitoring's obligations with respect to the registration of the
Old Notes and the New Notes will terminate. A copy of the Registration Rights
Agreement has been filed as an exhibit to the Registration Statement, of which
this Prospectus is a part, and the summary herein of the material provisions
thereof does not purport to be complete and is qualified in its entirety by
reference thereto. As a result of the timely filing and the effectiveness of the
Registration Statement, the Liquidated Damages provided for in the Registration
Rights Agreement will not become payable by Monitoring or the Guarantors.
Following the completion of the Exchange Offer (except as set forth in the
paragraph immediately below), holders of Old Notes not tendered will not have
any further registration rights and those Old Notes will continue to be subject
to certain restrictions on transfer. Accordingly, the liquidity of the market
for the Old Notes could be adversely affected upon consummation of the Exchange
Offer.
 
     In order to participate in the Exchange Offer, a holder must represent to
Monitoring and the Guarantors, among other things, that (i) the New Notes
acquired pursuant to the Exchange Offer are being obtained in the ordinary
course of business of the person receiving the New Notes, (ii) neither the
holder nor any such other person is engaging in or intends to engage in a
distribution of the New Notes, (iii) neither the holder nor any such other
person has an arrangement or understanding with any person to participate in the
distribution of the New Notes and (iv) neither the holder nor any such other
person is an "affiliate," as defined under Rule 405 promulgated under the
Securities Act, of Monitoring and the Guarantors. Pursuant to the Registration
Rights Agreement if (i) Monitoring determines that it is not permitted to effect
the Exchange Offer as contemplated hereby because of any applicable law or
Commission policy, or (ii) any holder of Transfer Restricted Securities notifies
Monitoring prior to the 20th day following consummation of the Exchange Offer
(a) that it is prohibited by law or Commission policy from participating in the
Exchange Offer, (b) that it may not resell the New Notes acquired by it in the
Exchange Offer to the public without delivering a prospectus and that this
Prospectus is not appropriate or available for such resales, or (c) that it is a
broker-dealer and owns Old Notes acquired directly from Monitoring or an
affiliate of Monitoring, Monitoring is required to file a "shelf" registration
statement for a continuous offering pursuant to Rule 415 under the Securities
Act in respect of the Old Notes. For purposes of the foregoing, "Transfer
Restricted Securities" means each Old Note until (i) the date on which such Old
Note has been exchanged for a New Note in the Exchange Offer, (ii) the date on
which such Old Note has been electively registered under the Securities Act and
disposed of in accordance with such "shelf" registration statement, (iii) the
date on which such Old Note is sold pursuant to Rule 144 under circumstances in
which any legend borne by such Old Note relating to restrictions on
transferability thereof, under the Securities Act or otherwise, is removed or
such Old Note is eligible to be sold pursuant to paragraph (k) of Rule 144, or
(iv) such Old Note shall cease to be outstanding. Other than as set forth in
this paragraph, no holder will have the right to participate in the "shelf"
registration statement nor otherwise require that Monitoring register such
holder's shares of Old Notes under the Securities Act. See "-- Procedures for
Tendering."
 
     Based on an interpretation by the Commission's staff set forth in no-action
letters issued to third parties unrelated to Monitoring and the Guarantors,
Monitoring believes that, with the exceptions set forth below, New Notes issued
pursuant to the Exchange Offer in exchange for Old Notes may be offered for
resale, resold
 
                                       15
<PAGE>   21
 
and otherwise transferred by any person receiving such New Notes, whether or not
such person is the registered holder (other than any such holder or such other
person which is (i) an "affiliate" of Monitoring or the Guarantors within the
meaning of Rule 405 under the Securities Act or (ii) a broker-dealer that
purchased such Old Notes directly from Monitoring to resell pursuant to Rule
144A or any other available exemption under the Securities Act or (iii) a person
participating in the distribution of the New Notes) without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
that the New Notes are acquired in the ordinary course of business of the holder
or such other person and neither the holder nor such other person has an
arrangement or understanding with any person to participate in the distribution
of such New Notes. Holders of Old Notes accepting the Exchange Offer will
represent to the Company in the Letter of Transmittal that such conditions have
been met. Any holder who tenders in the Exchange Offer for the purpose of
participating in a distribution of the New Notes cannot rely on this
interpretation by the Commission's staff and must comply with the registration
and prospectus delivery requirements of the Securities Act in connection with a
secondary resale transaction. Each broker-dealer that receives New Notes for its
own account in exchange for Old Notes, where such Old Notes were acquired by
such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such New Notes. See "Plan of Distribution."
 
     Each broker-dealer that receives New Notes for its own account pursuant to
the Exchange Offer must acknowledge that it acquired the Old Notes as a result
of market-making activities or other trading activities and will deliver a
prospectus in connection with any resale of such New Notes. This Prospectus, as
it may be amended or supplemented from time to time, may be used by a
broker-dealer in connection with resales of New Notes received in exchange for
Old Notes where such Old Notes were acquired by such broker-dealer as a result
of market-making activities or other trading activities. The Letter of
Transmittal states that by acknowledging and delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.
 
     Except as aforesaid, this Prospectus may not be used for an offer to
resell, resale or other retransfer of New Notes.
 
     The Exchange Offer is not being made to, nor will Monitoring accept tenders
for exchange from, holders of Old Notes in any jurisdiction in which the
Exchange Offer or the acceptance thereof would not be in compliance with the
securities or blue sky laws of such jurisdiction.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
     Following the completion of the Exchange Offer (except as set forth in the
second paragraph under "-- Purpose and Effect" above), holders of Old Notes not
tendered will not have any further registration rights and those Old Notes will
continue to be subject to certain restrictions on transfer. Accordingly, the
liquidity of the market for a holder's Old Notes could be adversely affected
upon completion of the Exchange Offer if the holder does not participate in the
Exchange Offer.
 
TERMS OF THE EXCHANGE OFFER
 
     Upon the terms and subject to the conditions set forth in this Prospectus
and in the Letter of Transmittal, Monitoring will accept any and all Old Notes
validly tendered and not withdrawn prior to 5:00 p.m., New York City time, on
the Expiration Date. Monitoring will issue $1,000 principal amount of New Notes
in exchange for each $1,000 principal amount of outstanding Old Notes accepted
in the Exchange Offer. Holders may tender some or all of their Old Notes
pursuant to the Exchange Offer. However, Old Notes may be tendered only in
integral multiples of $1,000 in principal amount.
 
     The form and terms of the New Notes are substantially the same as the form
and terms of the Old Notes except that the New Notes have been registered under
the Securities Act and will not bear legends restricting their transfer. The New
Notes will evidence the same debt as the Old Notes and will be issued pursuant
to, and entitled to the benefits of, the Indenture pursuant to which the Old
Notes were issued.
 
                                       16
<PAGE>   22
 
     As of September 11, 1998, Old Notes representing $250.0 million aggregate
principal amount were outstanding and there was one registered holder, a nominee
of DTC. This Prospectus, together with the Letter of Transmittal, is being sent
to such registered holder and to others believed to have beneficial interests in
the Old Notes. Monitoring intends to conduct the Exchange Offer in accordance
with the applicable requirements of the Exchange Act and the rules and
regulations of the Commission promulgated thereunder.
 
     Monitoring shall be deemed to have accepted validly tendered Old Notes
when, as, and if Monitoring has given oral or written notice thereof to the
Exchange Agent. The Exchange Agent will act as agent for the tendering holders
for the purpose of receiving the New Notes from Monitoring. If any tendered Old
Notes are not accepted for exchange because of an invalid tender, the occurrence
of certain other events set forth herein or otherwise, certificates for any such
unaccepted Old Notes will be returned, without expense, to the tendering holder
thereof as promptly as practicable after the Expiration Date.
 
     Holders who tender Old Notes in the Exchange Offer will not be required to
pay brokerage commissions or fees or, subject to the instructions in the Letter
of Transmittal, transfer taxes with respect to the exchange of Old Notes
pursuant to the Exchange Offer. Monitoring will pay all charges and expenses,
other than certain applicable taxes, in connection with the Exchange Offer. See
"-- Fees and Expenses."
 
EXPIRATION DATE; EXTENSIONS; AMENDMENTS
 
     The term "Expiration Date" shall mean 5:00 p.m., New York City time, on
               , 1998, unless Monitoring, in its sole discretion, extends the
Exchange Offer, in which case the term "Expiration Date" shall mean the latest
date and time to which the Exchange Offer is extended. In order to extend the
Exchange Offer, Monitoring will notify the Exchange Agent and each registered
holder of any extension by oral or written notice prior to 9:00 a.m., New York
City time, on the next business day after the previously scheduled Expiration
Date. Monitoring reserves the right, in its sole discretion, (i) to delay
accepting any Old Notes, to extend the Exchange Offer or, if any of the
conditions set forth under "-- Conditions to Exchange Offer" shall not have been
satisfied, to terminate the Exchange Offer, by giving oral or written notice of
such delay, extension or termination to the Exchange Agent, or (ii) to amend the
terms of the Exchange Offer in any manner.
 
PROCEDURES FOR TENDERING
 
     Only a holder of Old Notes may tender the Old Notes in the Exchange Offer.
Except as set forth under "-- Book-Entry Transfer," to tender in the Exchange
Offer a holder must complete, sign, and date the Letter of Transmittal, or a
copy thereof, have the signatures thereon guaranteed if required by the Letter
of Transmittal, and mail or otherwise deliver the Letter of Transmittal or copy
to the Exchange Agent prior to the Expiration Date. In addition, (i)
certificates for such Old Notes must be received by the Exchange Agent along
with the Letter of Transmittal prior to the Expiration Date, (ii) a timely
confirmation of a book-entry transfer (a "Book-Entry Confirmation") of such Old
Notes, if that procedure is available, into the Exchange Agent's account at DTC
(the "Book-Entry Transfer Facility") pursuant to the procedure for book-entry
transfer described below, must be received by the Exchange Agent prior to the
Expiration Date or (iii) the holder must comply with the guaranteed delivery
procedures described below. To be tendered effectively, the Letter of
Transmittal and other required documents must be received by the Exchange Agent
at the address set forth under "-- Exchange Agent" prior to 5:00 p.m., New York
City time, on the Expiration Date.
 
     The tender by a holder that is not withdrawn before the Expiration Date
will constitute an agreement between that holder and Monitoring in accordance
with the terms and subject to the conditions set forth herein and in the Letter
of Transmittal.
 
     THE METHOD OF DELIVERY OF OLD NOTES AND THE LETTER OF TRANSMITTAL AND ALL
OTHER REQUIRED DOCUMENTS TO THE EXCHANGE AGENT IS AT THE ELECTION AND RISK OF
THE HOLDER. INSTEAD OF DELIVERY BY MAIL, IT IS RECOMMENDED THAT HOLDERS USE AN
OVERNIGHT OR HAND DELIVERY SERVICE. IN ALL CASES, SUFFICIENT TIME SHOULD BE
ALLOWED TO ASSURE DELIVERY TO THE EXCHANGE AGENT BEFORE THE EXPIRATION DATE. NO
LETTER OF TRANSMITTAL OR OLD NOTES SHOULD BE SENT
                                       17
<PAGE>   23
 
TO THE COMPANY. HOLDERS MAY REQUEST THEIR RESPECTIVE BROKERS, DEALERS,
COMMERCIAL BANKS, TRUST COMPANIES OR NOMINEES TO EFFECT THESE TRANSACTIONS FOR
SUCH HOLDERS.
 
     Any beneficial owner whose Old Notes are registered in the name of a
broker, dealer, commercial bank, trust company, or other nominee and who wishes
to tender should contact the registered holder promptly and instruct the
registered holder to tender on the beneficial owner's behalf. If the beneficial
owner wishes to tender on the owner's own behalf, the owner must, prior to
completing and executing the Letter of Transmittal and delivering the owner's
Old Notes, either make appropriate arrangements to register ownership of the Old
Notes in the beneficial owner's name or obtain a properly completed bond power
from the registered holder. The transfer of registered ownership may take
considerable time.
 
     Signatures on a Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed by an Eligible Institution (as defined below)
unless Old Notes tendered pursuant thereto are tendered (i) by a registered
holder who has not completed the box entitled "Special Registration Instruction"
or "Special Delivery Instructions" on the Letter of Transmittal or (ii) for the
account of an Eligible Institution. If signatures on a Letter of Transmittal or
a notice of withdrawal, as the case may be, are required to be guaranteed, the
guarantee must be by any eligible guarantor institution that is a member of or
participant in the Securities Transfer Agents Medallion Program, the New York
Stock Exchange Medallion Signature Program or an "eligible guarantor
institution" within the meaning of Rule 17Ad-15 under the Exchange Act (an
"Eligible Institution").
 
     If the Letter of Transmittal is signed by a person other than the
registered holder of any Old Notes listed therein, the Old Notes must be
endorsed or accompanied by a properly completed bond power, signed by the
registered holder as that registered holder's name appears on the Old Notes.
 
     If the Letter of Transmittal or any Old Notes or bond powers are signed by
trustees, executors, administrators, guardians, attorneys-in-fact, officers of
corporations, or others acting in a fiduciary or representative capacity, such
persons should so indicate when signing, and evidence satisfactory to Monitoring
of their authority to so act must be submitted with the Letter of Transmittal
unless waived by Monitoring.
 
     All questions as to the validity, form, eligibility (including time of
receipt), acceptance, and withdrawal of tendered Old Notes will be determined by
Monitoring in its sole discretion, which determination will be final and
binding. Monitoring reserves the absolute right to reject any and all Old Notes
not properly tendered or any Old Notes Monitoring's acceptance of which would,
in the opinion of counsel for Monitoring, be unlawful. Monitoring also reserves
the right to waive any defects, irregularities or conditions of tender as to
particular Old Notes. Monitoring's interpretation of the terms and conditions of
the Exchange Offer (including the instructions in the Letter of Transmittal)
will be final and binding on all parties. Unless waived, any defects or
irregularities in connection with tenders of Old Notes must be cured within such
time as Monitoring shall determine. Although Monitoring intends to notify
holders of defects or irregularities with respect to tenders of Old Notes,
neither Monitoring, the Exchange Agent, nor any other person shall incur any
liability for failure to give such notification. Tenders of Old Notes will not
be deemed to have been made until such defects or irregularities have been cured
or waived. Any Old Notes received by the Exchange Agent that are not properly
tendered and as to which the defects or irregularities have not been cured or
waived will be returned by the Exchange Agent to the tendering holders, unless
otherwise provided in the Letter of Transmittal, as soon as practicable
following the Expiration Date.
 
     In addition, Monitoring reserves the right in its sole discretion to
purchase or make offers for any Old Notes that remain outstanding after the
Expiration Date or, as set forth under "-- Conditions to the Exchange Offer," to
terminate the Exchange Offer and, to the extent permitted by applicable law,
purchase Old Notes in the open market, in privately negotiated transactions, or
otherwise. The terms of any such purchases or offers could differ from the terms
of the Exchange Offer.
 
     By tendering, each holder will represent to Monitoring and the Guarantors
that, among other things, (i) the New Notes acquired pursuant to the Exchange
Offer are being obtained in the ordinary course of business of the person
receiving such New Notes, whether or not such person is the registered holder,
 
                                       18
<PAGE>   24
 
(ii) neither the holder nor any such other person is engaging in or intends to
engage in a distribution of such New Notes, (iii) neither the holder nor any
such other person has an arrangement or understanding with any person to
participate in the distribution of such New Notes and (iv) neither the holder
nor any such other person is an "affiliate," as defined under Rule 405 of the
Securities Act, of Monitoring and the Guarantors.
 
     In all cases, issuance of New Notes for Old Notes that are accepted for
exchange pursuant to the Exchange Offer will be made only after timely receipt
by the Exchange Agent of certificates for such Old Notes or a timely Book-Entry
Confirmation of such Old Notes into the Exchange Agent's account at the
Book-Entry Transfer Facility, a properly completed and duly executed Letter of
Transmittal (or, with respect to the DTC and its participants, electronic
instructions in which the tendering holder acknowledges its receipt of and
agreement to be bound by the Letter of Transmittal), and all other required
documents. If any tendered Old Notes are not accepted for any reason set forth
in the terms and conditions of the Exchange Offer or if Old Notes are submitted
for a greater principal amount than the holder desires to exchange, such
unaccepted or non-exchanged Old Notes will be returned without expense to the
tendering holder thereof (or, in the case of Old Notes tendered by book-entry
transfer into the Exchange Agent's account at the Book-Entry Transfer Facility
pursuant to the book-entry transfer procedures described below, such
nonexchanged Old Notes will be credited to an account maintained with such
Book-Entry Transfer Facility) as promptly as practicable after the expiration or
termination of the Exchange Offer.
 
     Each broker-dealer that receives New Notes for its own account in exchange
for Old Notes, where such Old Notes were acquired by such broker-dealer as a
result of market-making activities or other trading activities, must acknowledge
that it will deliver a prospectus in connection with any resale of such New
Notes. See "Plan of Distribution."
 
BOOK-ENTRY TRANSFER
 
     The Exchange Agent will make a request to establish an account with respect
to the Old Notes at the Book-Entry Transfer Facility for purposes of the
Exchange Offer within two business days after the date of this Prospectus, and
any financial institution that is a participant in the Book-Entry Transfer
Facility's systems may make book-entry delivery of Old Notes being tendered by
causing the Book-Entry Transfer Facility to transfer such Old Notes into the
Exchange Agent's account at the Book-Entry Transfer Facility in accordance with
such Book-Entry Transfer Facility's procedures for transfer. However, although
delivery of Old Notes may be effected through book-entry transfer at the
Book-Entry Transfer Facility, the Letter of Transmittal or copy thereof, with
any required signature guarantees and any other required documents, must, in any
case other than as set forth in the following paragraph, be transmitted to and
received by the Exchange Agent at the address set forth under "-- Exchange
Agent" on or prior to 5:00 p.m., New York City time, on the Expiration Date or
the guaranteed delivery procedures described below must be complied with.
 
     ATOP is the only method of processing exchange offers through DTC. To
accept the Exchange Offer through ATOP, participants in DTC must send electronic
instructions to DTC through DTC's communication system in lieu of sending a
signed, hard copy Letter of Transmittal. DTC is obligated to communicate those
electronic instructions to the Exchange Agent. To tender Old Notes through ATOP,
the electronic instructions sent to DTC and transmitted by DTC to the Exchange
Agent must contain the character by which the participant acknowledges its
receipt of and agrees to be bound by the Letter of Transmittal.
 
GUARANTEED DELIVERY PROCEDURES
 
     If a registered holder of the Old Notes desires to tender such Old Notes
and the Old Notes are not immediately available, or time will not permit such
holder's Old Notes or other required documents to reach the Exchange Agent
before the Expiration Date, or the procedure for book-entry transfer cannot be
completed on a timely basis, a tender may be effected if (i) the tender is made
through an Eligible Institution, (ii) prior to the Expiration Date, the Exchange
Agent receives from such Eligible Institution a properly completed and duly
executed Letter of Transmittal (or a facsimile thereof) and Notice of Guaranteed
Delivery, substantially in the form provided by Monitoring (by telegram, telex,
facsimile transmission, mail or hand delivery), setting forth the name and
address of the holder of Old Notes and the amount of Old Notes tendered, stating
that the
 
                                       19
<PAGE>   25
 
tender is being made thereby and guaranteeing that within three New York Stock
Exchange ("NYSE") trading days after the date of execution of the Notice of
Guaranteed Delivery, the certificates for all physically tendered Old Notes, in
proper form for transfer, or a Book-Entry Confirmation, as the case may be, and
any other documents required by the Letter of Transmittal will be deposited by
the Eligible Institution with the Exchange Agent and (iii) the certificates for
all physically tendered Old Notes, in proper form for transfer, or a Book-Entry
Confirmation, as the case may be, and any other documents required by the Letter
of Transmittal, are received by the Exchange Agent within three NYSE trading
days after the date of execution of the Notice of Guaranteed Delivery.
 
WITHDRAWAL RIGHTS
 
     Tenders of Old Notes may be withdrawn at any time prior to 5:00 p.m., New
York City time, on the Expiration Date.
 
     For a withdrawal of a tender of Old Notes to be effective, a written or
(for DTC participants) electronic ATOP transmission notice of withdrawal must be
received by the Exchange Agent at its address set forth under "-- Exchange
Agent" prior to 5:00 p.m., New York City time, on the Expiration Date. Any such
notice of withdrawal must (i) specify the name of the person having deposited
the Old Notes to be withdrawn (the "Depositor"), (ii) identify the Old Notes to
be withdrawn (including the certificate number or numbers and principal amount
of such Old Notes), (iii) be signed by the holder in the same manner as the
original signature on the Letter of Transmittal by which such Old Notes were
tendered (including any required signature guarantees) or be accompanied by
documents of transfer sufficient to have the Trustee register the transfer of
such Old Notes into the name of the person withdrawing the tender, and (iv)
specify the name in which any such Old Notes are to be registered, if different
from that of the Depositor. All questions as to the validity, form, and
eligibility (including time of receipt) of such notices will be determined by
Monitoring, whose determination shall be final and binding on all parties. Any
Old Notes so withdrawn will be deemed not to have been validly tendered for
exchange for purposes of the Exchange Offer. Any Old Notes which have been
tendered for exchange but which are not exchanged for any reason will be
returned to the holder thereof without cost to such holder as soon as
practicable after withdrawal, rejection of tender, or termination of the
Exchange Offer. Properly withdrawn Old Notes may be retendered by following one
of the procedures under "-- Procedures for Tendering" at any time on or prior to
the Expiration Date.
 
CONDITIONS TO THE EXCHANGE OFFER
 
     Notwithstanding any other provision of the Exchange Offer, Monitoring shall
not be required to accept for exchange, or to issue New Notes in exchange for,
any Old Notes and may terminate or amend the Exchange Offer if at any time
before the acceptance of such Old Notes for exchange or the exchange of the New
Notes for such Old Notes, Monitoring determines that the Exchange Offer violates
applicable law, any applicable interpretation of the staff of the Commission or
any order of any governmental agency or court of competent jurisdiction.
 
     The foregoing conditions are for the sole benefit of Monitoring and may be
asserted by Monitoring regardless of the circumstances giving rise to any such
condition or may be waived by Monitoring in whole or in part at any time and
from time to time in its sole discretion. The failure by Monitoring at any time
to exercise any of the foregoing rights shall not be deemed a waiver of any such
right and each such right shall be deemed an ongoing right which may be asserted
at any time and from time to time.
 
     In addition, Monitoring will not accept for exchange any Old Notes
tendered, and no New Notes will be issued in exchange for any such Old Notes, if
at such time any stop order shall be threatened or in effect with respect to the
Registration Statement of which this Prospectus constitutes a part or the
qualification of the Indenture under the Trust Indenture Act of 1939, as
amended. In any such event Monitoring is required to use every reasonable effort
to obtain the withdrawal of any stop order at the earliest possible time.
 
                                       20
<PAGE>   26
 
EXCHANGE AGENT
 
     All executed Letters of Transmittal should be directed to the Exchange
Agent. The Bank of New York has been appointed as Exchange Agent for the
Exchange Offer. Questions, requests for assistance and requests for additional
copies of this Prospectus or of the Letter of Transmittal should be directed to
the Exchange Agent addressed as follows:
 
                              THE BANK OF NEW YORK
 
<TABLE>
<S>                                            <C>
      By Registered or Certified Mail:           By Hand or Overnight Delivery before 4:30
                                                                   p.m.:
 
            The Bank of New York                           The Bank of New York
             101 Barclay Street                             101 Barclay Street
                  Floor 7-E                           Corporate Trust Services Window
          New York, New York 10286                             Ground Level
                                                         New York, New York 10286
        Attn: Reorganization Section,
             Gertude Jeanpierre                        Attn: Reorganization Section,
               (212) 815-5920                               Gertude Jeanpierre
                                                              (212) 815-5920
</TABLE>
 
                   By Facsimile (for Eligible Institutions):
                                 (212) 815-6339
 
                               For Information or
                           Confirmation by Telephone:
                                 (212) 815-5920
 
    (Originals of all documents sent by facsimile should be sent promptly by
                         registered or certified mail,
                   by hand or by overnight delivery service.)
 
FEES AND EXPENSES
 
     Monitoring will not make any payments to brokers, dealers or others
soliciting acceptances of the Exchange Offer. The principal solicitation is
being made by mail; however, additional solicitations may be made in person or
by telephone by officers and employees of Monitoring.
 
     The estimated cash expenses to be incurred in connection with the Exchange
Offer will be paid by Monitoring and are estimated in the aggregate to be
$100,000, which includes fees and expenses of the Exchange Agent, accounting,
legal, printing, and related fees and expenses.
 
TRANSFER TAXES
 
     Holders who tender their Old Notes for exchange will not be obligated to
pay any transfer taxes in connection therewith, except that holders who instruct
Monitoring to register New Notes in the name of, or request that Old Notes not
tendered or not accepted in the Exchange Offer be returned to, a person other
than the registered tendering holder will be responsible for the payment of any
applicable transfer tax thereon.
 
                                       21
<PAGE>   27
 
                          DESCRIPTION OF THE NEW NOTES
 
     As used in this "Description of the New Notes," all references to (i)
"Monitoring" shall mean Protection One Alarm Monitoring, Inc., excluding, unless
the context otherwise requires or as otherwise expressly stated, its
subsidiaries and (ii) "Protection One" shall mean Protection One, Inc.,
excluding, unless the context otherwise requires or as otherwise expressly
stated, its subsidiaries. Whenever this "Description of the New Notes" refers to
particular defined terms of the Senior Debt Indenture that are not otherwise
defined herein, such defined terms are incorporated herein by reference. For
definitions of certain capitalized terms used in the following summary, see
"-- Certain Definitions" below.
 
GENERAL
 
     The New Notes offered hereby will be issued pursuant to the Senior Debt
Indenture among Monitoring, the Guarantors and The Bank of New York, as trustee
(the "Senior Trustee"). The Old Notes were also issued pursuant to the Senior
Debt Indenture. The following summary of certain provisions of the Senior Debt
Indenture and the New Notes describes all material terms of such documents, but
does not purport to be complete and is subject to, and is qualified in its
entirety by reference to, the provisions of the Senior Debt Indenture, including
the definitions therein of certain terms, and of those terms in the Trust
Indenture Act of 1939 made a part thereof.
 
     The New Notes will be limited to $250.0 million aggregate principal amount
and will bear interest at the rate shown on the front cover of this Prospectus
from August 17, 1998 or from the most recent interest payment date to which
interest has been paid or duly provided for, payable semi-annually in arrears on
each February 15 and August 15 commencing February 15, 1999, to the persons in
whose names the New Notes are registered at the close of business on the
February 1 or August 1 as the case may be, preceding such February 15 or August
15. The New Notes will mature on August 15, 2005.
 
     Principal of, premium, if any, and interest on the Notes is payable, and
the Notes may be exchanged or transferred, at the office or agency of Monitoring
in the Borough of Manhattan, the City of New York (which initially will be the
corporate trust office of the Senior Trustee located in New York, New York) or,
at the option of Monitoring, payment of interest may be made by check mailed to
the Holders of the Notes at their respective addresses set forth in the register
of Holders of Notes; provided, however, that all payments of principal, premium
and interest with respect to Notes the Holders of which have given wire transfer
instructions to Monitoring will be required to be made by wire transfer of
immediately available funds to the accounts specified by the Holders thereof.
 
     The obligations of Monitoring under the Notes are fully and unconditionally
guaranteed by the Guarantors. The Notes are unsecured and rank pari passu with
all other unsecured and unsubordinated indebtedness of Monitoring and senior to
subordinated indebtedness, including the Discount Notes and the Convertible
Notes. The Guarantees are unsecured and rank pari passu with all other unsecured
and unsubordinated indebtedness of the respective Guarantors. Monitoring's
obligations under the Notes are effectively subordinated to all liabilities
(including trade payables) of its Subsidiaries that are not Subsidiary
Guarantors and Protection One's Guarantee are effectively subordinated to all
liabilities (including trade payables) of its Subsidiaries.
 
     Except as described under "-- Certain Covenants -- Change of Control" and
"Certain Covenants -- Merger, Consolidation and Sale of Assets" below, the
Senior Debt Indenture does not contain any other provisions that limits the
ability of Monitoring or the Guarantors to incur indebtedness or that affords
Holders of the Notes protection in the event of (a) a highly leveraged or
similar transaction involving Monitoring or a Guarantor or (b) a reorganization,
restructuring, merger or similar transaction involving Monitoring or a Guarantor
that may adversely affect the Holders of the New Notes. In addition, subject to
the limitations set forth under "-- Certain Covenants" below, Monitoring or any
Guarantor may, in the future, enter into certain transactions such as the sale
of all or substantially all of its assets or the merger or consolidation of
Monitoring with another entity that would increase the amount of Monitoring's or
such Guarantor's indebtedness or substantially reduce or eliminate Monitoring's
or such Guarantor's, as the case may be, assets, which may have an adverse
effect on Monitoring's ability to service its indebtedness, including the New
Notes.
                                       22
<PAGE>   28
 
OPTIONAL REDEMPTION
 
     The Notes may be redeemed, in whole or in part, at any time at the option
of Monitoring upon not less than 30 nor more than 60 days prior notice mailed by
first-class mail to each Holder's registered address, at a redemption price (the
"Make-Whole Price") equal to the greater of (i) 100% of the principal amount
thereof or (ii) as determined by an Independent Investment Banker, the sum of
the present values of the Remaining Scheduled Payments discounted to the
redemption date on a semiannual basis (assuming a 360-day year consisting of
twelve 30-day months) at the Adjusted Treasury Rate, plus, in each case, accrued
interest and Liquidated Damages, if any, thereon to the date of redemption.
 
     "Adjusted Treasury Rate" means with respect to any redemption date, the
rate per annum equal to the semiannual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue
(expressed as a percentage of its principal amount) equal to the Comparable
Treasury Price for such redemption date, plus 0.50%.
 
     "Business Day" means each Monday, Tuesday, Wednesday, Thursday and Friday
which is not a day on which banking institutions in The City of New York or in
the city in which the Corporate Trust Office is located are authorized or
obligated by law or executive order to close.
 
     "Comparable Treasury Issue" means the United States Treasury Security
selected by an Independent Investment Banker as having a maturity comparable to
the remaining term of the Notes that would be utilized, at the time of selection
and in accordance with customary financial practice, in pricing new issues of
corporate debt securities of comparable maturity to the remaining term of the
Notes.
 
     "Comparable Treasury Price" means, with respect to any redemption date, (i)
the average of the bid and asked prices for the Comparable Treasury Issue
(expressed in each case as a percentage of its principal amount) on the third
Business Day preceding such redemption date, as set forth in the daily
statistical release (or any successor release) published by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S.
Government Securities" or (ii) if such release (or any successor release) is not
published or does not contain such prices on such Business Day, (A) the
Reference Treasury Dealer Quotations for such redemption date, after excluding
the highest and lowest of such Reference Treasury Dealer Quotations, or (B) if
the Senior Trustee obtains fewer than three such Reference Treasury Dealer
Quotations, the average of all such quotations.
 
     "Independent Investment Banker" means the Reference Treasury Dealers
appointed by the Senior Trustee after consultation with Monitoring.
 
     "Reference Treasury Dealer" means each of Bear, Stearns & Co. Inc., Morgan
Stanley & Co. Incorporated, Lehman Brothers Inc. and Salomon Brothers Inc and
their respective successors; provided, however, that if any of the foregoing
shall cease to be a primary U.S. Government securities dealer in New York City
(a "Primary Treasury Dealer"), Monitoring shall substitute therefor another
Primary Treasury Dealer.
 
     "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any redemption date, the average as determined by
the Senior Trustee, of the bid and asked prices of the Comparable Treasury Issue
(expressed in each case as a percentage of its principal amount) quoted in
writing to the Senior Trustee by such Reference Treasury Dealer at 5:00 p.m. on
the third Business Day preceding such redemption date.
 
     "Remaining Scheduled Payments" means, with respect to each Note to be
redeemed, the remaining scheduled payments of the principal thereof and interest
thereon that would be due after the related redemption date but for such
redemption; provided, however, that, if such redemption date is not an interest
payment date with respect to such Note, the amount of the next succeeding
scheduled interest payment thereon will be reduced by the amount of interest
accrued thereon to such redemption date.
 
     Unless Monitoring defaults in payment of the redemption price, on and after
the redemption date, interest will cease to accrue on the Notes or portion
thereof called for redemption.
 
                                       23
<PAGE>   29
 
CERTAIN COVENANTS
 
  Change of Control
 
     Upon the occurrence of a Change of Control Triggering Event, each Holder of
Notes will have the right to require Monitoring to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of such Holder's Notes
pursuant to the offer described below (the "Change of Control Offer") at an
offer price in cash equal to 101% of the aggregate principal amount thereof plus
accrued and unpaid interest thereon, if any, to the date of purchase (the
"Change of Control Payment"). Within ten days following any Change of Control
Triggering Event, Monitoring will mail a notice to each Holder describing the
transaction or transactions that constitute the Change of Control Triggering
Event and offering to repurchase Notes on the date specified in such notice,
which date shall be no earlier than 30 days and no later than 60 days from the
date such notice is mailed (the "Change of Control Payment Date"), pursuant to
the procedures required by the Senior Debt Indenture and described in such
notice. Monitoring will comply with the requirements of Rule 14e-1 under the
Exchange Act and any other securities laws and regulations thereunder to the
extent such laws and regulations are applicable in connection with the
repurchase of the Notes as a result of a Change of Control Triggering Event.
 
     On the Change of Control Payment Date, Monitoring will, to the extent
lawful, (1) accept for payment all Notes or portions thereof properly tendered
pursuant to the Change of Control Offer, (2) deposit with the Paying Agent an
amount equal to the Change of Control Payment in respect of all Notes or
portions thereof so tendered and (3) deliver or cause to be delivered to the
Senior Trustee the Notes so accepted together with an Officers' Certificate
stating the aggregate principal amount of Notes or portions thereof being
purchased by Monitoring. The Paying Agent will promptly mail to each Holder of
Notes so tendered the Change of Control Payment for such Notes, and the Senior
Trustee will promptly authenticate and mail (or cause to be transferred by
book-entry) to each Holder a new Note equal in principal amount to any
unpurchased portion of the Notes surrendered, if any; provided that each such
new Note will be in a principal amount of $1,000 or an integral multiple
thereof. Monitoring will publicly announce the results of the Change of Control
Offer on or as soon as practicable after the Change of Control Payment Date.
 
     The Change of Control provisions described above will be applicable whether
or not any other provisions of the Senior Debt Indenture are applicable. Except
as described above with respect to a Change of Control Triggering Event, the
Senior Debt Indenture does not contain provisions that permit the Holders of the
Notes to require that Monitoring repurchase or redeem the Notes in the event of
a takeover, recapitalization or similar transaction.
 
     IN THE EVENT THAT AT ANY TIME (i) BOTH RATING AGENCIES ASSIGN THE NOTES AN
INVESTMENT GRADE RATING AND (ii) NO DEFAULT HAS OCCURRED AND IS CONTINUING UNDER
THE SENIOR DEBT INDENTURE, THE PROVISIONS OF THE SENIOR DEBT INDENTURE WITH
RESPECT TO A CHANGE OF CONTROL TRIGGERING OFFER WILL BE PERMANENTLY TERMINATED.
 
     The Senior Credit Facility contains and future senior indebtedness may
contain prohibitions of certain events that would constitute a Change of Control
Triggering Event. In addition, the exercise by the Holders of Notes of their
right to require Monitoring to repurchase the Notes could cause a default under
such other senior indebtedness, even if the Change of Control Triggering Event
itself does not, due to the financial effect of such repurchases on Monitoring.
Finally, Monitoring's ability to pay cash to the Holders of Notes upon a
repurchase may be limited by Monitoring's then existing financial resources.
 
     Monitoring will not be required to make a Change of Control Offer upon a
Change of Control Triggering Event if a third party makes the Change of Control
Offer in the manner, at the times and otherwise in compliance with the
requirements set forth in the Senior Debt Indenture applicable to a Change of
Control Offer made by Monitoring and purchases all Notes validly tendered and
not withdrawn under such Change of Control Offer.
 
                                       24
<PAGE>   30
 
  Liens
 
     The Senior Debt Indenture will provide that none of Protection One,
Monitoring or their respective Subsidiaries will, directly or indirectly,
create, incur, assume or suffer to exist any Lien of any kind on any asset now
owned or hereafter acquired to secure Debt without making, or causing such
Subsidiary to make, effective provision for securing the Notes equally and
ratably with (or prior to) such Debt or, in the event such Debt is subordinate
in right of payment to the Notes, prior to such Debt, as to such asset for so
long as such Debt will be so secured. The foregoing restrictions will not apply
to Liens in respect of Debt existing on the date of the Senior Debt Indenture or
to: (a) Liens securing only Notes; (b) Liens in favor of Protection One,
Monitoring or any of their respective Subsidiaries; (c) Liens on assets or
property existing immediately prior to the time of acquisition thereof (and not
created in anticipation of the financing of such acquisition); (d) Liens to
secure Debt incurred for the purpose of financing all or any part of the
purchase price or the cost of construction or improvement of assets or property
used in the business of Protection One, Monitoring or any of their respective
Subsidiaries and subject to such Liens, provided that (i) the principal amount
of any Debt secured by such a Lien does not exceed 100% of the direct and
indirect costs of such purchase, (ii) such Lien does not extend to or cover any
other assets or property other than such assets or property and any such
improvements, and (iii) such Debt is incurred within 180 days of such purchase,
construction or improvement; (e) Liens on assets or property of a Person
existing at the time such Person is merged with or into or consolidated with or
substantially all of the assets or property of such Person are otherwise
acquired by Protection One, Monitoring or any of their respective Subsidiaries
that were not created in anticipation of the acquisition of such Person,
provided that such Lien does not extend to or cover any property other than that
of the Person so merged, consolidated or acquired; (f) Liens in favor of a
governmental body to secure partial progress, advance or other payments pursuant
to any contract or statute of such governmental body; and (g) Liens to secure
Debt incurred to extend, renew, refinance, replace or refund (or successive
extensions, renewals, refinancings, replacements or refundings), in whole or in
part, (i) any secured Debt existing on the date of the Senior Debt Indenture, or
(ii) any Debt secured by any Lien referred to in the foregoing clauses, so long
as in each such case the Lien does not extend to any other property and the Debt
so secured is not increased other than for reasonable costs related to such
extension, renewal, refinancing, replacement or refunding.
 
     In addition to the foregoing, Protection One, Monitoring and their
respective Subsidiaries may incur a Lien or Liens to secure Debt (excluding Debt
secured by Liens permitted under the foregoing exceptions) the aggregate amount
of which, including Attributable Debt in respect of Sale and Leaseback
Transactions, does not exceed 10% of Consolidated Net Assets. Protection One,
Monitoring and their respective Subsidiaries may also incur a Lien or Liens to
secure any Debt incurred pursuant to a Sale and Leaseback Transaction, without
securing the Notes equally and ratably with or prior to such Debt, as
applicable, provided that such Sale and Leaseback Transaction is permitted by
the provisions of the Senior Debt Indenture described below in clauses (b) and
(c) under "-- Sale and Leaseback Transactions."
 
  Sale and Leaseback Transactions
 
     The Senior Debt Indenture will provide that none of Protection One,
Monitoring or their respective Subsidiaries will enter into any Sale and
Leaseback Transaction (except for a period, including renewals, not exceeding 36
months) unless (a) at the time of entering into such Sale and Leaseback
Transaction, Protection One, Monitoring or such Subsidiary would be entitled to
incur Debt, in a principal amount equal to the Attributable Debt in respect of
such Sale and Leaseback Transaction, secured by a Lien, without equally and
ratably securing the Notes; (b) Protection One, Monitoring or such Subsidiary
applies, within twelve months after the sale or transfer, an amount equal to the
greater of (i) the net proceeds of the assets sold pursuant to the Sale and
Leaseback Transaction, or (ii) the fair value (in the opinion of an executive
officer of Protection One or Monitoring, as applicable) of such assets to the
acquisition of or construction of assets or property used or to be used in the
ordinary course of business of Protection One, Monitoring or their respective
Subsidiaries; or (c) Protection One, Monitoring or such Subsidiary applies,
within twelve months after the sale or transfer, an amount equal to the net
proceeds of the assets sold pursuant to the Sale and Leaseback Transaction to
the voluntary defeasance or retirement of Debt (other than Debt that is held by
Protection One, Monitoring or
 
                                       25
<PAGE>   31
 
their respective Subsidiaries or Debt of Protection One or Monitoring or their
respective Subsidiaries that is subordinate in right of payment to the Notes or
the Guarantees, as applicable), which amount will not be less than the fair
value (in the opinion of an executive officer of Protection One or Monitoring,
as applicable) of such assets (adjusted to reflect an amount expended by
Protection One or Monitoring as set forth in clause (b) above) less an amount
equal to the principal amount of such Debt voluntarily defeased or retired by
Protection One, Monitoring or such Subsidiary within such twelve-month period.
 
  Subsidiary Guarantees
 
     (a) The Senior Debt Indenture will provide that Monitoring will not permit
any Domestic Subsidiary to issue Debt or any Subsidiary to guarantee the payment
of any Debt of Monitoring or any Guarantor (in each case, the "Guaranteed Debt;"
Monitoring or the Guarantor that is primarily liable on the Guaranteed Debt
being the "Obligor") unless: (i) if such Subsidiary is not a Subsidiary
Guarantor, such Subsidiary simultaneously executes and delivers a guarantee
pursuant to a supplemental indenture to the Senior Debt Indenture of payment of
the Notes by such Subsidiary; provided, however, such guarantee shall be
required only to the extent and for so long as such Subsidiary guarantees the
Guaranteed Debt or such Debt is outstanding and (ii) if such Debt or the
Guaranteed Debt is by its express terms subordinated in right of payment to the
Notes or the Guarantee of such Obligor, any such Debt or Guarantee of such
Subsidiary Guarantor with respect to the Guaranteed Debt shall be subordinated
in right of payment to such Subsidiary Guarantor's Guarantee with respect to the
Notes substantially to the same extent as the Debt or Guaranteed Debt is
subordinated to the Notes or the Guarantee of such Obligor.
 
     (b) The Senior Debt Indenture will require that (i) any Subsidiary
executing a Guarantee pursuant to clause (a) above will waive and will not in
any manner whatsoever claim or take the benefit or advantage of, any rights of
reimbursement indemnity or subrogation or any other rights against Monitoring or
any other Guarantor as a result of any payment by such Guarantor under its
Guarantee and (ii) such Subsidiary shall deliver to the Senior Trustee an
opinion of counsel to the effect that (A) such Guarantee of the Notes has been
duly executed and authorized and (B) such Guarantee of the Notes constitutes a
valid, binding and enforceable obligation of such Guarantor, except insofar as
enforcement thereof may be limited by bankruptcy, insolvency or similar laws
(including, without limitation, all laws relating to fraudulent transfers) and
except insofar as enforcement thereof is subject to general principles of
equity.
 
     (c) No Subsidiary Guarantor may consolidate with or merge with or into
(whether or not such Subsidiary Guarantor is the surviving Person), another
corporation, Person or entity whether or not affiliated with such Subsidiary
Guarantor unless (i) the Person formed by or surviving any such consolidation or
merger (if other than such Subsidiary Guarantor) assumes all the obligations of
such Subsidiary Guarantor pursuant to a supplemental indenture under the Notes
and the Senior Debt Indenture and (ii) immediately after giving effect to such
transaction no Default or Event of Default exists.
 
  Merger, Consolidation and Sale of Assets
 
     The Senior Debt Indenture will provide that neither Monitoring nor any
Guarantor shall consolidate with or merge into any other corporation or sell,
convey, transfer or lease its properties and assets substantially as an entirety
to any Person, unless: (1) the corporation formed by such consolidation or into
which Monitoring or a Guarantor, as applicable, is merged or the Person which
acquires by sale, conveyance or transfer, or which leases, the properties and
assets of Monitoring or a Guarantor, substantially as an entirety (A) shall be a
corporation, partnership, limited liability company or trust organized and
validly existing under the laws of the United States of America, any state
thereof or the District of Columbia and (B) shall expressly assume, by an
indenture supplemental thereto, executed and delivered to the Senior Trustee, in
form reasonably satisfactory to the Senior Trustee, the obligations of
Monitoring and/or any Guarantor, as applicable, for the due and punctual payment
of the principal of, premium and Liquidated Damages, if any, and interest on all
the Notes and the performance and observance of every covenant of the Senior
Debt Indenture on the part of Monitoring or the Guarantees on the part of any
Guarantor to be performed or observed; (2) immediately after giving effect to
such transaction, no Default or Event of Default shall have occurred and be
continuing; and (3) Monitoring or a Guarantor, as applicable, or such Person
shall have delivered to the Senior Trustee an
                                       26
<PAGE>   32
 
Officers' Certificate and an Opinion of Counsel, each stating that such
consolidation, merger, conveyance, transfer or lease and such supplemental
indenture comply with the "Merger, Consolidation and Sale of Assets" provisions
of the Senior Debt Indenture and that all conditions precedent provided for
relating to such transaction have been satisfied. These provisions apply only to
a merger or consolidation in which Monitoring or a Guarantor, as applicable, is
not the surviving corporation and to sales, conveyances, leases and transfers by
Monitoring and any Guarantor as transferor or lessor.
 
     The Senior Debt Indenture will further provide that upon consolidation by
Monitoring or any Guarantor, as applicable, with any other Person or merger by
Monitoring or a Guarantor, as applicable, into any other Person or any sale,
conveyance, transfer or lease of the properties and assets of Monitoring or any
Guarantor, as applicable, substantially as an entirety to any Person in
accordance with the preceding paragraph, the successor Person formed by such
consolidation or into which Monitoring or any Guarantor, as applicable, is
merged or to which such conveyance, transfer or lease is made shall succeed to,
and be substituted for, and may exercise every right and power of, Monitoring
under the Senior Debt Indenture and any Guarantor under the Guarantees, as
applicable, with the same effect as if such successor Person had been named as
Monitoring or any Guarantor therein, respectively, and in the event of any such
conveyance or transfer, Monitoring and the Guarantor, as applicable, except in
the case of a lease, shall be discharged of all obligations and covenants under
the Senior Debt Indenture and the Notes.
 
BOOK-ENTRY, DELIVERY AND FORM
 
     Except as set forth in the next paragraph, the New Notes to be resold as
set forth herein will initially be issued in the form of one or more Global
Notes (the "Global Notes"). The Global Notes will be deposited on the date of
the closing of the exchange of the Old Notes for the New Notes (the "Closing
Date") with, or on behalf of the Depositary and registered in the name of Cede &
Co., as nominee of the Depositary (such nominee being referred to herein as the
"Global Note Holder").
 
     Notes that are issued as described below under "-- Certificated Notes" will
be issued in the form of registered definitive certificates (the "Certificated
Notes"). Upon the transfer of Certificated Notes, such Certificated Notes may,
unless all Global Notes have previously been exchanged for Certificated Notes,
be exchanged for an interest in the Global Note representing the principal
amount of Notes being transferred, subject to the transfer restrictions set
forth in the Senior Debt Indenture.
 
     The Depositary is a limited-purpose trust company that was created to hold
securities for its participating organizations (collectively, the "Participants"
or the "Depositary's Participants") and to facilitate the clearance and
settlement of transactions in such securities between Participants through
electronic book-entry changes in accounts of its Participants. The Depositary's
Participants include securities brokers and dealers (including the Initial
Purchasers), banks and trust companies, clearing corporations and certain other
organizations. Access to the Depositary's system is also available to other
entities such as banks, brokers, dealers and trust companies (collectively, the
"Indirect Participants" or the "Depositary's Indirect Participants") that clear
through or maintain a custodial relationship with a Participant, either directly
or indirectly. Persons who are not Participants may beneficially own securities
held by or on behalf of the Depositary only through the Depositary's
Participants or the Depositary's Indirect Participants.
 
     Monitoring expects that pursuant to procedures established by the
Depositary (i) upon deposit of the Global Notes, the Depositary will credit the
accounts of Participants designated by the Initial Purchasers with portions of
the principal amount of the Global Notes and (ii) ownership of the Notes
evidenced by the Global Notes will be shown on, and the transfer of ownership
thereof will be effected only through, records maintained by the Depositary
(with respect to the interests of the Depositary's Participants), the
Depositary's Participants and the Depositary's Indirect Participants.
Prospective purchasers are advised that the laws of some states require that
certain persons take physical delivery in definitive form of securities that
they own. Consequently, the ability to transfer New Notes evidenced by the
Global Note will be limited to such extent. For certain other restrictions on
the transferability of the New Notes, see "Notice to Investors."
 
     So long as the Global Note Holder is the registered owner of any Notes, the
Global Note Holder will be considered the sole Holder under the Senior Debt
Indenture of any Notes evidenced by the Global Notes.
                                       27
<PAGE>   33
 
Beneficial owners of Notes evidenced by the Global Notes will not be considered
the owners or Holders thereof under the Senior Debt Indenture for any purpose,
including with respect to the giving of any directions, instructions or
approvals to the Senior Trustee thereunder. Neither Monitoring nor the Senior
Trustee will have any responsibility or liability for any aspect of the records
of the Depositary or for maintaining, supervising or reviewing any records of
the Depositary relating to the Notes.
 
     Payments in respect of the principal of, premium, if any, interest and
Liquidated Damages, if any, on any Notes registered in the name of the Global
Note Holder on the applicable record date will be payable by the Trustee to or
at the direction of the Global Note Holder in its capacity as the registered
Holder under the Indenture. Upon the terms of the Senior Debt Indenture,
Monitoring and the Senior Trustee may treat the persons in whose names Notes,
including the Global Notes, are registered as the owners thereof for the purpose
of receiving such payments. Consequently, neither Monitoring nor the Senior
Trustee has or will have any responsibility or liability for the payment of such
amounts to beneficial owners of Notes. Monitoring believes, however, that it is
currently the policy of the Depositary to immediately credit the accounts of the
relevant Participants with such payments, in amounts proportionate to their
respective holdings of beneficial interests in the relevant security as shown on
the records of the Depositary. Payments by the Depositary's Participants and the
Depositary's Indirect Participants to the beneficial owners of New Notes will be
governed by standing instructions and customary practice and will be the
responsibility of the Depositary's Participants or the Depositary's Indirect
Participants.
 
  Certificated Notes
 
     Subject to certain conditions, any person having a beneficial interest in a
Global Note may, upon request to the Senior Trustee, exchange such beneficial
interest for Notes in the form of Certificated Notes. Upon any such issuance,
the Senior Trustee is required to register such Certificated Notes in the name
of, and cause the same to be delivered to, such person or persons (or the
nominee of any thereof). All such Certificated Notes would be subject to the
legend requirements described herein under "Notice to Investors." In addition,
if (i) Monitoring notifies the Senior Trustee in writing that the Depositary is
no longer willing or able to act as a depositary and Monitoring is unable to
locate a qualified successor within 90 days or (ii) Monitoring, at its option,
notifies the Senior Trustee in writing that it elects to cause the issuance of
Notes in the form of Certificated Notes under the Senior Debt Indenture, then,
upon surrender by the Global Note Holder of its Global Note, Notes in such form
will be issued to each person that the Global Note Holder and the Depositary
identify as being the beneficial owner of the related Notes.
 
     Neither Monitoring nor the Senior Trustee will be liable for any delay by
the Global Note Holder or the Depositary in identifying the beneficial owners of
Notes and Monitoring and the Senior Trustee may conclusively rely on, and will
be protected in relying on, instructions from the Global Note Holder or the
Depositary for all purposes.
 
  Same Day Settlement and Payment
 
     The Senior Debt Indenture will require that payments in respect of the
Notes represented by the Global Note (including principal, premium, if any,
interest and Liquidated Damages, if any) be made by wire transfer of immediately
available next day funds to the accounts specified by the Global Note Holder.
With respect to Certificated Notes, Monitoring will make all payments of
principal, premium, if any, interest and Liquidated Damages, if any, by wire
transfer of immediately available funds to the accounts specified by the Holders
thereof or, if no such account is specified, by mailing a check to each such
Holder's registered address. Monitoring expects that secondary trading in the
Certificated Notes will also be settled in immediately available funds.
 
EVENTS OF DEFAULT
 
     The following will be "Events of Default" under the Senior Debt Indenture
with respect to the Notes:
 
          (1) default in the payment of interest on the Notes when such interest
     becomes due and payable, and continuance of such default for a period of 60
     days; or
                                       28
<PAGE>   34
 
          (2) default in the payment of the principal of (or premium, if any,
     on) the Notes at their Maturity or upon any redemption and such default
     shall continue for five or more days; or
 
          (3) default in the performance, or breach, of any covenant or warranty
     in the Senior Debt Indenture (other than a default in the performance, or
     breach, of a covenant or warranty which is specifically dealt with
     elsewhere under this "Events of Default" section), and continuance of such
     default or breach for a period of 90 days after there has been given, by
     registered or certified mail, to Monitoring and any Guarantor by the Senior
     Trustee or to Monitoring, any Guarantor and the Senior Trustee by the
     Holders of at least 33 1/3% of all outstanding Notes, a written notice
     specifying such default or breach and requiring it to be remedied and
     stating that such notice is a "Notice of Default" thereunder; or
 
          (4) the entry of a decree or order by a court having jurisdiction in
     the premises adjudging Monitoring or any Guarantor bankrupt or insolvent,
     or approving as properly filed a petition seeking reorganization,
     arrangement, adjustment or composition of or in respect of Monitoring or
     any Guarantor under the Federal Bankruptcy Code or any other applicable
     federal or state law, or appointing a receiver, liquidator, assignee,
     trustee, sequestrator (or other similar official) of Monitoring or any
     Guarantor, or of any substantial part of the property of Monitoring or any
     Guarantor, or ordering the winding up or liquidation of the affairs of
     Monitoring or any Guarantor, and the continuance of any such decree or
     order unstayed and in effect for a period of 90 consecutive days; or
 
          (5) the institution by Monitoring or any Guarantor of proceedings to
     be adjudicated bankrupt or insolvent, or the consent by Monitoring or any
     Guarantor to the institution of bankruptcy or insolvency proceedings
     against either of them, or the filing by either of them of a petition or
     answer or consent seeking reorganization or relief under the Federal
     Bankruptcy Code or any other applicable federal or state law, or the
     consent by either of them, to the filing of any such petition or to the
     appointment of a receiver, liquidator, assignee, trustee, sequestrator (or
     other similar official) of Monitoring or any Guarantor, or of any
     substantial part of the property of Monitoring or any Guarantor, or the
     making by either of them of an assignment for the benefit of creditors.
 
     The failure to redeem any Notes subject to a Conditional Redemption is not
an Event of Default if any event on which such redemption is so conditioned does
not occur and is not waived before the scheduled redemption date.
 
     If an Event of Default described in clause (1), (2) or (3) above with
respect to the Notes at the time outstanding occurs and is continuing, then in
every such case the Senior Trustee or the Holders of not less than 33 1/3% in
principal amount of the outstanding Notes may declare the principal amount of
all of the Notes to be due and payable immediately, by a notice in writing to
Monitoring and any Guarantor (and to the Senior Trustee if given by Holders),
and upon any such declaration such principal amount (or specified portion
thereof) shall become immediately due and payable. If an Event of Default
described in clause (4) or (5) above occurs and is continuing, then the
principal amount of all the Notes shall ipso facto become and be immediately due
and payable without any declaration or other act on the part of the Senior
Trustee or any Holder.
 
     At any time after a declaration of acceleration with respect to the Notes
has been made, the Holders of a majority in principal amount of the outstanding
Notes, by written notice to Monitoring or any Guarantor and the Senior Trustee,
may rescind and annul such declaration and its consequences if the rescission
would not conflict with any judgment or decree and if all existing Events of
Default have been cured or waived except nonpayment of principal or interest
that has become due solely because of acceleration. No such rescission shall
affect any subsequent default or impair any right consequent thereto.
 
     Except as otherwise provided in the Senior Debt Indenture, or any
supplement thereto, the Holders of not less than a majority in principal amount
of the outstanding Notes may on behalf of the Holders of all the Notes waive any
past default described in clause (1), (2), (3) of the first paragraph of this
section (or, in the case of a default described in clause (4) or (5) of the
first paragraph of this section, the Holders of not less than a majority in
principal amount of all outstanding Notes may waive any such past default), and
its consequences, except a default (i) in respect of the payment of the
principal of (or premium, if any, on) or
                                       29
<PAGE>   35
 
interest on any Note, or (ii) in respect of a covenant or provision which under
the Senior Debt Indenture cannot be modified or amended without the consent of
the Holder of each outstanding Note affected.
 
     Upon any such waiver, any such default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been cured, for every
purpose of the Senior Debt Indenture; but no such waiver shall extend to any
subsequent or other default or Event of Default.
 
     During the existence of an Event of Default, the Senior Trustee is required
to exercise such rights and powers vested in it under the Senior Debt Indenture
in good faith. Subject to the provisions of the Senior Debt Indenture relating
to the duties of the Senior Trustee, in case an Event of Default shall occur and
be continuing, the Senior Trustee is not under any obligation to exercise any of
its rights or powers under the Senior Debt Indenture at the request or direction
of any of the Holders unless such Holders shall have offered to the Senior
Trustee reasonable security or indemnity. Subject to certain provisions
concerning the rights of the Senior Trustee, with respect to the Notes, the
Holders of not less than a majority in principal amount of the outstanding Notes
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Senior Trustee, or exercising any
trust or power conferred on the Senior Trustee under the Senior Debt Indenture.
 
     Monitoring is required to deliver to the Senior Trustee, within 120 days
after the end of each fiscal year, a brief certificate of its compliance with
all of the conditions and covenants under the Senior Debt Indenture.
 
DEFEASANCE OR COVENANT DEFEASANCE
 
     The Senior Debt Indenture will provide that Monitoring may, at its option
and at any time, terminate its obligations with respect to the outstanding Notes
and the obligations of the Guarantors with respect to the Guarantees
("defeasance"). Such defeasance means that Monitoring shall be deemed to have
paid and discharged the entire indebtedness represented by the outstanding
Notes, except for the following which shall survive until otherwise terminated
or discharged under the Senior Debt Indenture: (A) the rights of Holders of such
outstanding Notes to receive, solely from the trust fund described in the Senior
Debt Indenture, payments in respect of the principal of (and premium, if any,
on) and interest on such Notes when such payments are due, (B) obligations of
Monitoring to issue temporary Notes, register the transfer or exchange of any
Notes, replace mutilated, destroyed, lost or stolen Notes, maintain an office or
agency for payments in respect of the Notes and, if Monitoring acts as its own
Paying Agent, hold in trust, money to be paid to such Persons entitled to
payment, and with respect to "additional amounts," as contemplated by the Senior
Debt Indenture, if any, on such Notes as contemplated in the Senior Debt
Indenture, (C) the rights, powers, trusts, duties and immunities of the Senior
Trustee under the Senior Debt Indenture and (D) the defeasance provisions of the
Senior Debt Indenture. In addition, Monitoring may, at its option and at any
time, elect to terminate the obligations of Monitoring, POI and their respective
Subsidiaries with respect to certain covenants that are set forth in the Senior
Debt Indenture and any omission to comply with such obligations shall not
constitute a Default or an Event of Default with respect to the Notes ("covenant
defeasance").
 
     In order to exercise either defeasance or covenant defeasance:
 
          (1) Monitoring shall irrevocably have deposited or caused to be
     deposited with the Senior Trustee, in trust, for the purpose of making the
     following payments, specifically pledged as security for, and dedicated
     solely to, the benefit of the Holders of such Notes, (A) money in an amount
     (in such currency in which such Notes are then specified as payable at
     Stated Maturity), or (B) U.S. Government Obligations applicable to such
     Notes which through the scheduled payment of principal and interest in
     respect thereof in accordance with their terms will provide, not later than
     one day before the due date of any payment of principal (including any
     premium) and interest, if any, under such Notes, money in an amount or (C)
     a combination thereof, sufficient, in the opinion of a nationally
     recognized firm of independent public accountants to pay and discharge (i)
     the principal of (and premium, if any, on) and interest on the outstanding
     Notes on the Stated Maturity (or any Redemption Date selected by
     Monitoring, if applicable) of such principal (and premium, if any) or
     installment or interest and (ii) any mandatory sinking fund payments or
     analogous payments applicable to the outstanding Notes on the day on which
     such payments are due and payable in accordance with the terms of the
     Senior Debt Indenture
                                       30
<PAGE>   36
 
     and of such Notes; provided, however, that the Senior Trustee shall have
     been irrevocably instructed to apply such money or the proceeds of such
     U.S. Government Obligations to said payments with respect to such Notes.
     Before such a deposit, Monitoring may give to the Senior Trustee, in
     accordance with the redemption provisions in the Senior Debt Indenture, a
     notice of its election to redeem all or any portion of such outstanding
     Notes at a future date in accordance with the terms of the Notes and the
     redemption provisions of the Senior Debt Indenture, which notice shall be
     irrevocable. Such irrevocable redemption notice, if given, shall be given
     effect in applying the foregoing;
 
          (2) such defeasance or covenant defeasance shall not result in a
     breach or violation of, or constitute a default under, the Senior Debt
     Indenture or any other material agreement or instrument to which Monitoring
     is a party or by which it is bound;
 
          (3) in the case of a covenant defeasance, Monitoring shall have
     delivered to the Senior Trustee an Opinion of Counsel to the effect that
     the Holders of the outstanding Notes will not recognize income, gain or
     loss for federal income tax purposes as a result of such covenant
     defeasance and will be subject to federal income tax on the same amounts,
     in the same manner and at the same times as would have been the case if
     such covenant defeasance had not occurred;
 
          (4) such defeasance or covenant defeasance shall be effected in
     compliance with any additional or substitute terms, conditions or
     limitations in connection therewith pursuant to the Senior Debt Indenture;
     and
 
          (5) Monitoring shall have delivered to the Senior Trustee an Officers'
     Certificate and an Opinion of Counsel, each stating that all conditions
     precedent under the Senior Debt Indenture to either defeasance or covenant
     defeasance, as the case may be, have been satisfied.
 
AMENDMENTS AND WAIVERS
 
     The Senior Debt Indenture will provide that at any time and from time to
time, Monitoring and the Senior Trustee may, without the consent of any holder
of Notes, enter into one or more indentures supplemental thereto for certain
specified purposes, including, among other things, to (i) cure ambiguities,
defects or inconsistencies, or to make any other provisions with respect to
questions or matters arising under the Senior Debt Indenture; (ii) effect or
maintain the qualification of the Senior Debt Indenture under the TIA; (iii)
secure any Notes; (iv) add covenants for the protection of the holders of Notes;
(vi) to establish the forms or terms of Notes; (vii) make any other change that
does not adversely affect in all material respects the rights under such Senior
Debt Indenture of the holders of Notes thereunder; (viii) add any Guarantee;
(ix) evidence the acceptance of appointment by a successor trustee; and (x) to
evidence the succession of another person to Monitoring or any Guarantor and the
assumption by any such successor of the obligations of Monitoring or such
Guarantor in accordance with the Senior Debt Indenture and the Notes. Other
amendments and modifications of the Senior Debt Indenture or the Notes may be
made by Monitoring and the Senior Trustee with the consent of the holders of not
less than a majority of the aggregate principal amount of all of the then
outstanding Notes; provided, however, that no such modification or amendment
may, without the consent of the holder of each outstanding Note affected
thereby, (1) change the Stated Maturity of the principal of, or any installment
of interest on, any Note or reduce the principal amount thereof or the rate of
interest thereon or any premium payable upon the redemption thereof, or change
any obligation of Monitoring to pay any "additional amounts" contemplated by the
Senior Debt Indenture (except as contemplated and permitted by certain
provisions of the Senior Debt Indenture), or adversely affect, after the event
giving rise to any right of repayment shall have occurred, any right of
repayment at the option of any Holder of any Note, or change any place of
payment described in the Senior Note Indenture where, or the currency in which,
any Note or any premium or the interest thereon is payable, or impair the right
to institute suit for the enforcement of any such payment on or after the Stated
Maturity thereof (or, in the case of redemption or repayment at the option of
the Holder, on or after the redemption date or repayment date, as the case may
be), or adversely affect any right to convert or exchange any Notes as may be
provided pursuant to the Senior Debt Indenture, or (2) reduce the percentage in
principal amount of the outstanding Notes of any series, the consent of whose
Holders is required for any such supplemental indenture, for any waiver of
 
                                       31
<PAGE>   37
 
compliance with certain provisions of the Senior Debt Indenture or certain
defaults thereunder and their consequences provided for in the Senior Debt
Indenture.
 
CERTAIN DEFINITIONS
 
     "Attributable Debt" means, as to any particular lease under which any
Person is at the time liable at any date as of which the amount thereof is to be
determined, the total net amount of rent required to be paid by such Person
under such lease during the remaining term thereof, excluding renewals,
discounted at a rate per annum equal to the prevailing market interest rate, at
the time such lease was entered into, on United States Treasury obligations
having a maturity substantially the same as the average term of such lease, plus
3%. The net amount of rent required to be paid under any such lease for any such
period shall be the amount of the rent payable by the lessee with respect to
such period, after excluding amounts required to be paid on account of
maintenance and repairs, insurance, taxes, assessments, water rates and similar
charges and contingent rents such as those based on sales. In the case of any
lease which is terminable by the lessee upon the payment of a penalty, such net
amount shall also include the amount of such penalty, but no rent shall be
considered as required to be paid under such lease subsequent to the first date
upon which it may be so terminated.
 
     "Change of Control" means (i) the consummation of any transaction
(including, without limitation, any merger or consolidation) the result of which
is that any "person" (as such term is used in Section 13(d)(3) of the Exchange
Act), other than the Principal and its Related Parties, becomes the "beneficial
owner" (as such term is defined in Rule 13d-3 and rule 13d-5 under the Exchange
Act), directly or indirectly, of more than 35% of the Voting Stock of POI or
Monitoring (measured by voting power rather than number of shares) or (ii) the
first day on which a majority of the members of the Board of Directors of POI or
Monitoring are not Continuing Directors.
 
     "Conditional Redemption" means a redemption pursuant to a notice of
redemption that provides that it is subject to the occurrence of any event
before the date fixed for such redemption as described in such notice of
redemption.
 
     "Change of Control Triggering Event" means the occurrence of both a Change
of Control and a Rating Decline.
 
     "Consolidated Net Assets" means the total assets shown on the most recent
quarterly reviewed consolidated balance sheet of Monitoring and its consolidated
subsidiaries, after deducting the amount of all current liabilities and goodwill
and trademarks.
 
     "Continuing Directors" means, as of any date of determination, any member
of the Board of Directors of Monitoring who (i) was a member of such Board of
Directors on the date of the Senior Debt Indenture or (ii) was nominated for
election or elected to such Board of Directors with the approval of a majority
of the Continuing Directors who were members of such Board at the time of such
nomination or election.
 
     "Debt" means notes, bonds, debentures or other similar evidences of
indebtedness for money borrowed.
 
     "Default" means any event which is, or after notice or passage of time or
both would be, an Event of Default.
 
     "Domestic Subsidiary" means a subsidiary organized under the laws of one of
the states of the United States or the District of Columbia.
 
     "Holder" means a Person in whose name a Note is registered.
 
     "Investment Grade Rating" means a rating equal to or higher than Baa3 (or
the equivalent) and BBB-(or the equivalent) by Moody's Investors Service, Inc.
(or any successor to the rating agency business thereof) and Standard & Poor's
Ratings Group (or any successor to the rating agency business thereof),
respectively.
 
     "Lien" means any mortgage, charge, security interest, pledge,
hypothecation, assignment, deposit arrangement, encumbrance, lien (statutory or
other) or preference, priority or other security agreement except: (a) liens for
taxes, assessments, levies and other governmental charges (i) which are not yet
                                       32
<PAGE>   38
 
delinquent or (ii) which are being contested in good faith by all appropriate
proceedings; (b) carriers', warehousemen's, mechanics', materialmen's,
repairmen's, brokers' or other like liens (i) which do not remain unsatisfied or
undischarged for a period of more than 90 days, or (ii) which are being
contested in good faith by all appropriate proceedings; (c) attachment or
judgment liens not giving rise to or an Event of Default and which are being
contested in good faith by appropriate proceedings; (d) pledges or deposits in
connection with workers compensation, unemployment insurance and other social
security legislation and deposits securing liability to insurance carriers under
insurance or self-insurance arrangements or to obtain the benefit of, or to
comply with, laws; (e) deposits to secure the performance of bids, trade
contracts (other than for borrowed money), leases, statutory obligations, surety
and appeal bonds, performance bonds and other obligations of a like nature
incurred in the ordinary course of business; and (f) easements, rights of way,
restrictions, development orders, plats and other similar encumbrances.
 
     "Maturity," when used with respect to any Notes, means the date on which
the principal of such Notes or an installment of principal becomes due and
payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, notice of redemption, notice of option to elect
repayment or otherwise.
 
     "Officers' Certificate" means a certificate signed by the Chief Executive
Officer, the President, the Chief Financial Officer, any Vice President, the
Treasurer, any Assistant Treasurer, the Secretary or any Assistant Secretary of
Monitoring, and delivered to the Senior Trustee.
 
     "Opinion of Counsel" means a written opinion of counsel, who may be counsel
for Monitoring, including an employee of Monitoring.
 
     "Paying Agent" means any Person (including Monitoring acting as Paying
Agent) authorized by Monitoring to pay the principal of (and premium, if any,
on) or interest on any Notes on behalf of Monitoring.
 
     "Person" means any individual, corporation, partnership, limited liability
company, joint venture, association, joint-stock company, trust, unincorporated
organization or government or any agency or political subdivision thereof.
 
     "Principal" means Western Resources, Inc.
 
     "Rating Agencies" mean Standard & Poor's Ratings Group, a division of
McGraw Hill, Inc. ("S&P"), and Moody's Investors Service, Inc. ("Moody's") or
any successor to the respective rating agency businesses thereof.
 
     "Rating Category" means (i) with respect to S&P, any of the following
categories: AAA, AA, A, BBB, BB, B, CCC, CC, C and D (or equivalent successor
categories); (ii) with respect to Moody's any of the following categories: Aaa,
Aa, A, Baa, Ba, B, Caa, Ca and C (or equivalent successor categories) and (iii)
the equivalent of any such category of S&P and Moody's used by another Rating
Agency. In determining whether the rating of the Notes has decreased by one or
more gradations, gradations within Rating Categories (+ and - for S&P: 1, 2 and
3 for Moody's; or the equivalent gradations for another Rating Agency) shall be
taken into account (e.g., with respect to S&P, a decline in a rating from BB+ to
BB, as well as from BB- to B+, will constitute a decrease of one gradation).
 
     "Rating Decline" means (i) a decrease of two or more gradations (including
gradations within Rating Categories as well as between Rating Categories) in the
rating of the Notes by either Rating Agency from the rating of the Notes by such
Rating Agency or (ii) a withdrawal of the rating of the Notes by either Rating
Agency, provided that such decrease or withdrawal occurs on, or within 90 days
after, the date of public notice of the occurrence of a Change of Control or of
the intention by the Company to effect a Change of Control (which period shall
be extended so long as the rating of the Notes is under publicly announced
consideration for possible downgrade by either Rating Agency).
 
     "Related Party" with respect to the Principal means (A) any controlling
stockholder, 80% (or more) owned Subsidiary of such Principal or (B) any trust,
corporation, partnership or other entity, the beneficiaries, stockholders,
partners, owners or Persons beneficially holding an 80% or more controlling
interest of which consist of the Principal and/or such other Persons referred to
in the immediately preceding clause (A).
                                       33
<PAGE>   39
 
     "Sale and Leaseback Transaction" of any Person means an arrangement with
any lender or investor or to which such lender or investor is a party providing
for the leasing by such Person of any property or asset of such Person which has
been or is being sold or transferred by such Person more than 270 days after the
acquisition thereof or the completion of construction or commencement of
operation thereof to such lender or investor or to any Person to whom funds have
been or are to be advanced by such lender or investor on the security of such
property or asset. The stated maturity of such arrangement is the date of the
last payment of rent or any other amount due under such arrangement prior to the
first date on which such arrangement may be terminated by the lessee without
payment of a penalty.
 
     "Stated Maturity," when used with respect to any Notes or any installment
of principal thereof or interest thereon, means the date specified in such Notes
as the fixed date on which the principal of such Notes or such installment of
principal or interest is due and payable.
 
     "Subsidiary" means any corporation of which at the time of determination a
Person, directly and/or indirectly through one or more Subsidiaries, owns more
than 50% of the Voting Stock.
 
     "Subsidiary Guarantors" means each of WestSec and Westar and each other
direct and indirect Subsidiary of Monitoring that is required to execute a
Guarantee pursuant to the Senior Debt Indenture.
 
     "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939 as in
force at the date as of which the Senior Debt Indenture were executed, except
that any supplemental indenture executed pursuant to the Senior Debt Indenture
shall conform to the requirements of the Trust Indenture Act as in effect on the
date of execution thereof.
 
     "U.S. Government Obligations" means direct obligations (or certificates
representing an ownership interest in such obligations) of the United States of
America (including any agency or instrumentality thereof) for the payment of
which the full faith and credit of the United States of America is pledged and
which are not callable or redeemable at the issuer's option.
 
     "Voting Stock" means stock of the class or classes having general voting
power under ordinary circumstances to elect at least a majority of the board of
directors, managers, trustees or individuals performing similar functions of a
Person (irrespective of whether or not at the time stock of any other class or
classes shall have or might have voting power by reason of the happening of any
contingency).
 
                                       34
<PAGE>   40
 
                   CERTAIN FEDERAL INCOME TAX CONSIDERATIONS
 
     The following discussion is a summary of certain federal income tax
considerations relevant to the exchange of Old Notes for New Notes, but does not
purport to be a complete analysis of all potential tax effects. The discussion
is based upon the Internal Revenue Code of 1986, as amended, Treasury
regulations, Internal Revenue Service rulings and pronouncements, and judicial
decisions now in effect, all of which are subject to change at any time by
legislative, judicial or administrative action. Any such changes may be applied
retroactively in a manner that could adversely affect a holder of the New Notes.
The description does not consider the effect of any applicable foreign, state,
local or other tax laws or estate or gift tax considerations.
 
     EACH HOLDER SHOULD CONSULT HIS OWN TAX ADVISOR AS TO THE PARTICULAR TAX
CONSEQUENCES TO IT OF EXCHANGING OLD NOTES FOR NEW NOTES, INCLUDING THE
APPLICABILITY AND EFFECT OF ANY STATE, LOCAL OR FOREIGN TAX LAWS.
 
EXCHANGE OF OLD NOTES FOR NEW NOTES
 
     The exchange of Old Notes for New Notes pursuant to the Exchange Offer
should not constitute a sale or an exchange for federal income tax purposes.
Accordingly, such exchange should have no federal income tax consequences to
holders of Old Notes.
 
                              PLAN OF DISTRIBUTION
 
     Each broker-dealer that receives New Notes for its own account in exchange
for Old Notes pursuant to the Exchange Offer, where such Old Notes were acquired
by such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such New Notes. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of New Notes received in exchange for Old Notes where such Old
Notes were acquired as a result of market-making activities or other trading
activities. Monitoring has agreed that, for a period of 90 days after the
Registration Statement is declared effective, it will make this Prospectus, as
amended or supplemented, available to any broker-dealer for use in connection
with any such resale. In addition, until                , 1998, all dealers
effecting transactions in the New Notes may be required to deliver a Prospectus.
 
     Monitoring and the Guarantors will not receive any proceeds from any sale
of New Notes by broker-dealers. New Notes received by broker-dealers for their
own account pursuant to the Exchange Offer may be sold from time to time in one
or more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the New Notes or a combination of such methods
of resale, at market prices prevailing at the time of resale, at prices related
to such prevailing market prices or negotiated prices. Any such resale may be
made directly to purchasers or to or through brokers or dealers who may receive
compensation in the form of commissions or concessions from any such
broker-dealer or the purchasers of any such New Notes. Any broker-dealer that
resells New Notes that were received by it for its own account pursuant to the
Exchange Offer and any broker or dealer that participates in a distribution of
such New Notes may be deemed to be an "underwriter" within the meaning of the
Securities Act, and any profit on any such resale of New Notes and any
commissions or concessions received by any such persons may be deemed to be
underwriting compensation under the Securities Act. The Letter of Transmittal
states that by acknowledging that it will deliver and by delivering a
prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.
 
     For a period of 90 days after the Registration Statement is declared
effective, Monitoring will promptly send additional copies of this Prospectus
and any amendment or supplement to this Prospectus to any broker-dealer that
requests such documents in the Letter of Transmittal or otherwise. Monitoring
has agreed to pay all expenses incident to the Exchange Offer (including the
expenses of one counsel for the holders of the Notes) other than commissions or
concessions of any broker-dealers and will indemnify holders of the Old
 
                                       35
<PAGE>   41
 
Notes (including any broker-dealers) against certain liabilities, including
certain liabilities under the Securities Act.
 
                                 LEGAL MATTERS
 
     The validity of the New Notes and Guarantees will be passed upon for
Monitoring and the Guarantors by Weil, Gotshal & Manges LLP, Dallas, Texas and
New York, New York.
 
                                    EXPERTS
 
     The consolidated balance sheets of the Company as of December 31, 1996 and
1997 and the consolidated statements of operations, shareholders' equity, and
cash flows for each of the three years in the period ended December 31, 1997,
referenced in this Prospectus have been included herein in reliance on the
report of Arthur Andersen LLP, independent accountants, given on the authority
of that firm as experts in accounting and auditing.
 
                                       36
<PAGE>   42
 
          ------------------------------------------------------------
          ------------------------------------------------------------
 
NO DEALER, SALESPERSON OR OTHER INDIVIDUAL HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS AND,
IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED BY THE COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN
OFFER TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, ANY SECURITY OTHER THAN THE
SECURITIES TO WHICH IT RELATES, OR ANY OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY THE SECURITIES IN ANY JURISDICTION WHERE, OR TO ANY PERSON TO WHOM,
IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS
PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE
ANY IMPLICATION THAT THERE HAS NOT BEEN ANY CHANGE IN THE FACTS SET FORTH IN
THIS PROSPECTUS OR IN THE AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                             PAGE
                                             ----
<S>                                          <C>
Available Information......................    i
Incorporation of Certain Documents by          i
  Reference................................
Forward-Looking Statements.................   ii
Certain Definitions........................   ii
Prospectus Summary.........................    1
Risk Factors...............................    7
Ratio of Earnings to Combined Fixed           14
  Charges..................................
The Exchange Offer.........................   15
Description of the New Notes...............   22
Certain United States Federal Income Tax      35
  Considerations...........................
Plan of Distribution.......................   35
Legal Matters..............................   36
Experts....................................   36
</TABLE>
 
                            ------------------------
     UNTIL             , 1998, ALL DEALERS EFFECTING TRANSACTIONS IN THE NEW
NOTES, WHETHER OR NOT PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED TO
DELIVER A PROSPECTUS. THIS IS IN ADDITION TO THE OBLIGATION OF DEALERS TO
DELIVER A PROSPECTUS WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR
UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
 
          ------------------------------------------------------------
          ------------------------------------------------------------
          ------------------------------------------------------------
          ------------------------------------------------------------
 
                       OFFER TO EXCHANGE ALL OUTSTANDING
                                 7 3/8% SENIOR
                                 NOTES DUE 2005
                                      FOR
                                 7 3/8% SENIOR
                                 NOTES DUE 2005
                             ---------------------
 
                                   PROSPECTUS
                             ---------------------
 
                                            , 1998
          ------------------------------------------------------------
          ------------------------------------------------------------
<PAGE>   43
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 20. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     The Certificates of Incorporation and the Bylaws of POI, Monitoring,
Network Holdings, Network Multi-Family and Comsec and the Articles of
Incorporation and Bylaws of WestSec, provide for the indemnification of
directors and officers to the fullest extent permitted by the General
Corporation Law of the State of Delaware (the "DGCL") and the Kansas General
Corporation Law (the "KGCL"), as applicable. The Articles of Incorporation and
Bylaws of DSC provide for the indemnification of directors and, by a majority
vote of its stockholders, officers to the fullest extent permitted by the
Maryland General Corporation Law (the "MGCL"). Pursuant to the provisions of
Section 145 of the DGCL, each of POI and Monitoring has the power to indemnify
any person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding by reason of the
fact that he is or was a director, officer, employee, or agent of such company
against any and all expenses, judgments, fines and amounts paid in settlement
actually and reasonably incurred in connection with such action, suit or
proceeding. The power to indemnify under the DGCL only applies if such person
acted in good faith and in a manner he reasonably believed to be in the best
interest, or not opposed to the best interest, of such company and with respect
to any criminal action or proceeding, had no reasonable cause to believe his
conduct was unlawful. Section 17-6305 of the KGCL provides for indemnification
by a corporation of its corporate officers, directors, employees and agents or,
if serving at the request of corporation, of any other corporation, partnership,
joint venture, trust or other enterprise. The KGCL provides that a corporation
may indemnify such persons who have been, are, or may become parties to an
action, suit or proceeding due to their status as directors, officers, employees
or agents of the corporation. Further, the KGCL grants authority to a
corporation to implement its own broader indemnification policy. Section 2-418
of the MGCL permits a corporation to indemnify any director or officer of such
corporation made party to any proceeding by reason of service in that capacity
unless it is established that (i) the act of such person was material to the
matter giving rise to the proceedings and was committed in bad faith or was the
result of active and deliberate dishonesty, (ii) such person actually received
an improper personal benefit, or (iii) such person had reasonable cause to
believe the act or omission was unlawful.
 
     Indemnification is not available if such person has been adjudged to have
been liable to Monitoring, unless and only to the extent that the Court of
Chancery or the court in such action determines that, despite the adjudication
of liability, but in view of all of the circumstances, the person is reasonably
and fairly entitled to indemnification for such expenses as the court shall deem
proper. The statutes also expressly provide that the power to indemnify
authorized thereby is not exclusive of any rights granted under any bylaw,
agreement, vote of shareholders or disinterested directors or otherwise.
 
     The above discussion of the Certificates of Incorporation and Bylaws of POI
and Monitoring, the Articles of Incorporation and Bylaws of WestSec and Westar,
Section 145 of the DGCL and Section 17-6305 of the KGCL is not intended to be
exhaustive and is qualified in its entirety by reference thereto.
 
     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of POI,
Monitoring, WestSec and Westar pursuant to the foregoing provisions, or
otherwise, POI, Monitoring, WestSec and Westar have been advised that in the
opinion of the Commission, such indemnification is against public policy as
expressed in the Securities Act and is therefore unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment of expenses incurred or paid by a director, officer or controlling
person thereof in the successful defense of any action, suit or proceeding) is
asserted by a director, officer or controlling person in connection with the
securities being registered, POI, Monitoring, WestSec and Westar will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question of whether such
indemnification by it is against public policy as expressed in the Securities
Act and will be governed by the final adjudication of such issue.
 
                                      II-1
<PAGE>   44
 
ITEM 21. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
     (a) Exhibits:
 
<TABLE>
<CAPTION>
        EXHIBIT
          NO.                                    DESCRIPTION
        -------                                  -----------
<C>                      <S>
          3.1            -- Certificate of Incorporation of POI, as amended
                            (incorporated by reference to the Form 10-Q filed for the
                            fiscal quarter ended June 30, 1998).
          3.2            -- Bylaws of POI (incorporated by reference to the Form 10-Q
                            filed for the fiscal quarter ended June 30, 1998).
          3.3            -- Certificate of Incorporation of Monitoring, as amended
                            (incorporated by reference to the Form 10-Q filed for the
                            fiscal quarter ended June 30, 1998).
          3.4            -- Bylaws of Monitoring (incorporated by reference to the
                            Form 10-Q filed for the fiscal quarter ended June 30,
                            1998).
          3.5            -- Articles of Incorporation of WestSec, as amended.*
          3.6            -- Bylaws of WestSec.*
          3.7            -- Articles of Incorporation of Westar, as amended.*
          3.8            -- Bylaws of Westar.*
          3.9            -- Certificate of Incorporation of Network Holdings, as
                            amended.**
          3.10           -- Bylaws of Network Holdings.**
          3.11           -- Certificate of Incorporation of Network Multi-Family, as
                            amended.**
          3.12           -- Bylaws of Network Multi-Family.**
          3.13           -- Articles of Incorporation of DSC, as amended.**
          3.14           -- Bylaws of DSC.**
          3.15           -- Certificate of Incorporation of Comsec, as amended.**
          3.16           -- Bylaws of Comsec**
          4.1            -- Indenture, dated as of August 17, 1998, among Monitoring,
                            as issuer, the Guarantors named therein and The Bank of
                            New York, as trustee.*
          4.2            -- Supplement to Indenture, among Monitoring, as issuer, the
                            Guarantors named therein and The Bank of New York, as
                            trustee.**
          5.1            -- Opinion of Weil, Gotshal & Manges LLP as to the validity
                            of the securities registered hereby.**
         10.1            -- Purchase Agreement, dated as of August 12, 1998, among
                            Monitoring, as issuer, the Guarantors named therein and
                            the Initial Purchasers.*
         10.2            -- Registration Rights Agreement, dated as of August 17,
                            1998, among Monitoring, the Guarantors named therein and
                            the Initial Purchasers.*
         12.1            -- Statement regarding computation of ratio of earnings to
                            fixed charges (incorporated by reference to the Amendment
                            No. 1 to Form S-3 of POI and Monitoring filed on May 5,
                            1998, Registration No. 333-50383).
         23.1            -- Consent of Weil, Gotshal & Manges LLP (included in the
                            opinion to be filed as Exhibit 5.1 to the Registration
                            Statement).
         23.2            -- Consent of Arthur Andersen LLP, independent auditors.*
         24.1            -- Powers of Attorney of directors and executive officers of
                            the Co-Registrants (included on the signature pages
                            hereto).
         25.1            -- Statement of Eligibility and Qualification of The Bank of
                            New York, as trustee, under the Indenture listed as
                            Exhibit 4.1 hereto on Form T-1.**
         99.1            -- Form of Letter of Transmittal.*
         99.2            -- Form of Notice of Guaranteed Delivery.*
</TABLE>
 
---------------
 
 * Filed herewith.
 
** To be filed by amendment.
 
                                      II-2
<PAGE>   45
 
ITEM 22. UNDERTAKINGS.
 
     (a) The undersigned Co-Registrants hereby undertake:
 
          (1) To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement:
 
             (i) To include any prospectus required by Section 10(a)(3) of the
        Securities Act;
 
             (ii) To reflect in the prospectus any facts or events arising after
        the effective date of the registration statement (or the most recent
        post-effective amendment thereof) which, individually or in the
        aggregate, represent a fundamental change in the information set forth
        in the registration statement. Notwithstanding the foregoing, any
        increase or decrease in volume of securities offered (if the total
        dollar value of securities offered would not exceed that which was
        registered) and any deviation from the low or high end of the estimated
        maximum offering range may be reflected in the form of prospectus filed
        with the Commission pursuant to Rule 424(b) if, in the aggregate, the
        changes in volume and price represent no more than a 20 percent change
        in the maximum aggregate offering price set forth in the "Calculation of
        Registration Fee" table in the effective registration statement; and
 
             (iii) to include any material information with respect to the plan
        of distribution not previously disclosed in the registration statement
        or any material change to such information in the registration
        statement;
 
          (2) That, for the purpose of determining any liability under the
     Securities Act, each such post-effective amendment shall be deemed to be a
     new registration statement relating to the securities offered therein, and
     the offering of such securities at the time shall be deemed to be the
     initial bona fide offering thereof.
 
          (3) To remove from registration by means of a post-effective amendment
     any of the securities being registered which remain unsold at the
     termination of the offering.
 
          (4) The undersigned Co-Registrants hereby undertake to respond to
     requests for information that is incorporated by reference into the
     prospectus pursuant to Item 4, 10(b), 11, or 13 of this form, within one
     business day of receipt of such request, and to send the incorporated
     documents by first class mail or other equally prompt means. This includes
     information contained in documents filed subsequent to the effective date
     of the registration statement through the date of responding to the
     request.
 
          (5) The undersigned Co-Registrants hereby undertake to supply by means
     of a post-effective amendment all information concerning a transaction, and
     the company being acquired involved therein, that was not the subject of
     and included in the registration statement when it became effective.
 
                                      II-3
<PAGE>   46
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, each
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                        PROTECTION ONE, INC.
                                        PROTECTION ONE ALARM MONITORING, INC.
 
                                        By:        /s/ JOHN W. HESSE
                                           -------------------------------------
                                                       John W. Hesse
                                            Executive Vice President and Chief
                                                     Executive Officer
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of Protection One, Inc. and
Protection One Alarm Monitoring, Inc., or on behalf of the undersigned as a
director or officer of Protection One, Inc. and Protection One Alarm Monitoring,
Inc., and any and all amendments or supplements to the Registration Statement,
including any and all stickers and post-effective amendments to the Registration
Statement, and to sign any and all additional Registration Statements relating
to the same offering of Securities as the Registration Statement that are filed
pursuant to Rule 462 under the Securities Act of 1933, as amended, and to file
the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission and any applicable
securities exchange or securities self-regulatory body, granting unto said
attorneys-in-fact and agents, each acting alone, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or their substitutes or substitute, may lawfully
do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
             /s/ JAMES M. MACKENZIE, JR.               President, Chief Executive    September 21, 1998
-----------------------------------------------------    Officer and Director
               James M. Mackenzie, Jr.                   (Principal Executive
                                                         Officer)
 
                  /s/ JOHN W. HESSE                    Executive Vice President,     September 21, 1998
-----------------------------------------------------    Chief Financial Officer
                    John W. Hesse                        and Secretary (Principal
                                                         Financial and Accounting
                                                         Officer)
 
                 /s/ PETER C. BROWN                    Director                      September 21, 1998
-----------------------------------------------------
                   Peter C. Brown
</TABLE>
 
                                      II-4
<PAGE>   47
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
                /s/ ROBERT M. CHEFITZ                  Director                      September 21, 1998
-----------------------------------------------------
                  Robert M. Chefitz
 
              /s/ HOWARD A. CHRISTENSEN                Director                      September 21, 1998
-----------------------------------------------------
                Howard A. Christensen
 
                   /s/ BEN M. ENIS                     Director                      September 21, 1998
-----------------------------------------------------
                     Ben M. Enis
 
                /s/ JOSEPH J. GARDNER                  Director                      September 21, 1998
-----------------------------------------------------
                  Joseph J. Gardner
 
                /s/ WILLIAM J. GREMP                   Director                      September 21, 1998
-----------------------------------------------------
                  William J. Gremp
 
                /s/ STEVEN L. KITCHEN                  Director                      September 21, 1998
-----------------------------------------------------
                  Steven L. Kitchen
 
               /s/ CARL M. KOUPAL, JR.                 Director                      September 21, 1998
-----------------------------------------------------
                 Carl M. Koupal, Jr.
 
              /s/ JOHN C. NETTELS, JR.                 Director                      September 21, 1998
-----------------------------------------------------
                John C. Nettels, Jr.
 
               /s/ JANE DRESNER SADAKA                 Director                      September 21, 1998
-----------------------------------------------------
                 Jane Dresner Sadaka
 
                 /s/ JAMES Q. WILSON                   Director                      September 21, 1998
-----------------------------------------------------
                   James Q. Wilson
</TABLE>
 
                                      II-5
<PAGE>   48
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                        WESTSEC, INC.
 
                                        By:        /s/ JOHN W. HESSE
                                           -------------------------------------
                                                       John W. Hesse
                                                  Treasurer and Secretary
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of WestSec, Inc., or on behalf
of the undersigned as a director or officer of WestSec, Inc., and any and all
amendments or supplements to the Registration Statement, including any and all
stickers and post-effective amendments to the Registration Statement, and to
sign any and all additional Registration Statements relating to the same
offering of Securities as the Registration Statement that are filed pursuant to
Rule 462 under the Securities Act of 1933, as amended, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission and any applicable securities exchange or
securities self-regulatory body, granting unto said attorneys-in-fact and
agents, each acting alone, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in and about the
premises, as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents, or their substitutes or substitute, may lawfully do or cause to be done
by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
               /s/ STEVEN A. MILLSTEIN                 President and Director        September 21, 1998
-----------------------------------------------------    (Principal Executive
                 Steven A. Millstein                     Officer)
 
                  /s/ JOHN W. HESSE                    Treasurer, Secretary and      September 21, 1998
-----------------------------------------------------    Director (Principal
                    John W. Hesse                        Financial and Accounting
                                                         Officer)
 
                /s/ JOHN E. MACK, III                  Director                      September 21, 1998
-----------------------------------------------------
                  John E. Mack, III
</TABLE>
 
                                      II-6
<PAGE>   49
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                            WESTAR SECURITY, INC.
 
                                            By:      /s/ JOHN W. HESSE
                                              ----------------------------------
                                                        John W. Hesse
                                                   Treasurer and Secretary
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of Westar Security, Inc., or on
behalf of the undersigned as a director or officer of Westar Security, Inc., and
any and all amendments or supplements to the Registration Statement, including
any and all stickers and post-effective amendments to the Registration
Statement, and to sign any and all additional Registration Statements relating
to the same offering of Securities as the Registration Statement that are filed
pursuant to Rule 462 under the Securities Act of 1933, as amended, and to file
the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission and any applicable
securities exchange or securities self-regulatory body, granting unto said
attorneys-in-fact and agents, each acting alone, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or their substitutes or substitute, may lawfully
do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
               /s/ STEVEN A. MILLSTEIN                 President and Director        September 21, 1998
-----------------------------------------------------    (Principal Executive
                 Steven A. Millstein                     Officer)
 
                  /s/ JOHN W. HESSE                    Treasurer, Secretary and      September 21, 1998
-----------------------------------------------------    Director (Principal
                    John W. Hesse                        Financial and Accounting
                                                         Officer)
 
                /s/ JOHN E MACK, III                   Director                      September 21, 1998
-----------------------------------------------------
                  John E Mack, III
</TABLE>
 
                                      II-7
<PAGE>   50
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, each
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                            NETWORK HOLDINGS, INC.
                                            NETWORK MULTI-FAMILY
                                            SECURITY CORPORATION
 
                                            By:      /s/ JOHN W. HESSE
                                              ----------------------------------
                                                        John W. Hesse
                                                     Assistant Secretary
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of Network Holdings, Inc. and
Network Multi-Family Security Corporation, or on behalf of the undersigned as a
director or officer of Network Holdings, Inc. and Network Multi-Family Security
Corporation, and any and all amendments or supplements to the Registration
Statement, including any and all stickers and post-effective amendments to the
Registration Statement, and to sign any and all additional Registration
Statements relating to the same offering of Securities as the Registration
Statement that are filed pursuant to Rule 462 under the Securities Act of 1933,
as amended, and to file the same, with all exhibits thereto, and other documents
in connection therewith, with the Securities and Exchange Commission and any
applicable securities exchange or securities self-regulatory body, granting unto
said attorneys-in-fact and agents, each acting alone, full power and authority
to do and perform each and every act and thing requisite and necessary to be
done in and about the premises, as fully to all intents and purposes as he might
or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or their substitutes or substitute, may lawfully
do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
                /s/ STEVE V. WILLIAMS                  President and Director        September 21, 1998
-----------------------------------------------------    (Principal Executive
                  Steve V. Williams                      Officer)
 
                  /s/ JOHN W. HESSE                    Assistant Secretary and       September 21, 1998
-----------------------------------------------------    Director (Principal
                    John W. Hesse                        Financial and Accounting
                                                         Officer)
 
                /s/ JOHN E. MACK, III                  Director                      September 21, 1998
-----------------------------------------------------
                  John E. Mack, III
</TABLE>
 
                                      II-8
<PAGE>   51
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                            DSC ENTERPRISES, INC.
 
                                            By:      /s/ JOHN W. HESSE
                                              ----------------------------------
                                                        John W. Hesse
                                                   Treasurer and Secretary
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of DSC Enterprises, Inc., or on
behalf of the undersigned as a director or officer of DSC Enterprises, Inc., and
any and all amendments or supplements to the Registration Statement, including
any and all stickers and post-effective amendments to the Registration
Statement, and to sign any and all additional Registration Statements relating
to the same offering of Securities as the Registration Statement that are filed
pursuant to Rule 462 under the Securities Act of 1933, as amended, and to file
the same, with all exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission and any applicable
securities exchange or securities self-regulatory body, granting unto said
attorneys-in-fact and agents, each acting alone, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or their substitutes or substitute, may lawfully
do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
               /s/ STEVEN A. MILLSTEIN                 President and Director        September 21, 1998
-----------------------------------------------------    (Principal Executive
                 Steven A. Millstein                     Officer)
 
                  /s/ JOHN W. HESSE                    Treasurer, Secretary and      September 21, 1998
-----------------------------------------------------    Director (Principal
                    John W. Hesse                        Financial and Accounting
                                                         Officer)
 
                /s/ JOHN E. MACK, III                  Vice President and Director   September 21, 1998
-----------------------------------------------------
                  John E. Mack, III
</TABLE>
 
                                      II-9
<PAGE>   52
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the
Co-Registrant certifies that it has reasonable grounds to believe that it meets
all requirements for filing on Form S-4 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Dallas, State of Texas, on September 21, 1998.
 
                                          COMSEC/NARRAGANSETT SECURITY, INC.
 
                                          By:       /s/ JOHN W. HESSE
                                            ------------------------------------
                                                       John W. Hesse
                                                  Treasurer and Secretary
 
                               POWER OF ATTORNEY
 
     Know all those by these presents, that each person whose signature appears
below constitutes and appoints each of James M. Mackenzie, Jr. and John W.
Hesse, or any of them, each acting alone, his true and lawful attorney-in-fact
and agent, with full Power of Substitution and Resubstitution, for such person
and in his name, place and stead, in any and all capacities, in connection with
the Registration Statement on Form S-4 of Protection One Alarm Monitoring, Inc.
and the Guarantors named therein under the Securities Act of 1933, as amended,
including, without limitation the generality of the foregoing, to sign the
Registration Statement in the name and on behalf of Comsec/Narragansett
Security, Inc. or on behalf of the undersigned as a director or officer of
Comsec/Narragansett Security, Inc., and any and all amendments or supplements to
the Registration Statement, including any and all stickers and post-effective
amendments to the Registration Statement, and to sign any and all additional
Registration Statements relating to the same offering of Securities as the
Registration Statement that are filed pursuant to Rule 462 under the Securities
Act of 1933, as amended, and to file the same, with all exhibits thereto, and
other documents in connection therewith, with the Securities and Exchange
Commission and any applicable securities exchange or securities self-regulatory
body, granting unto said attorneys-in-fact and agents, each acting alone, full
power and authority to do and perform each and every act and thing requisite and
necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all
that said attorneys-in-fact and agents, or their substitutes or substitute, may
lawfully do or cause to be done by virtue hereof.
 
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                   TITLE                     DATE
                      ---------                                   -----                     ----
<C>                                                    <S>                           <C>
 
                /s/ THOMAS K. RANKIN                   President                     September 21, 1998
-----------------------------------------------------
                  Thomas K. Rankin
 
                /s/ JOHN E. MACK, III                  Vice President and Director   September 21, 1998
-----------------------------------------------------
                  John E. Mack, III
 
                  /s/ JOHN W. HESSE                    Secretary, Treasurer and      September 21, 1998
-----------------------------------------------------    Director
                    John W. Hesse
 
               /s/ STEVEN A. MILLSTEIN                 Director                      September 21, 1998
-----------------------------------------------------
                 Steven A. Millstein
</TABLE>
 
                                      II-10
<PAGE>   53
 
                               INDEX TO EXHIBITS
 
<TABLE>
<CAPTION>
        EXHIBIT
          NO.                                    DESCRIPTION
        -------                                  -----------
<C>                      <S>
 
          3.5            -- Articles of Incorporation of WestSec, as amended.
          3.6            -- Bylaws of WestSec.
          3.7            -- Articles of Incorporation of Westar, as amended.
          3.8            -- Bylaws of Westar.
          4.1            -- Indenture, dated as of August 17, 1998, among Monitoring,
                            as issuer, the Guarantors named therein and The Bank of
                            New York, as trustee.
         10.1            -- Purchase Agreement, dated as of August 12, 1998, among
                            Monitoring, as issuer, the Guarantors named therein and
                            the Initial Purchasers.
         10.2            -- Registration Rights Agreement, dated as of August 17,
                            1998, among Monitoring, the Guarantors named therein and
                            the Initial Purchasers.
         23.2            -- Consent of Arthur Andersen LLP, independent auditors.
         99.1            -- Form of Letter of Transmittal.
         99.2            -- Form of Notice of Guaranteed Delivery.
</TABLE>