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                                                                   EXHIBIT 10.48

                            SECOND AMENDMENT TO LEASE

         THIS SECOND AMENDMENT TO LEASE, effective January 1, 1999, by and
between 1471 Building Corporation ("Lessor") and Security Associates
International, Inc., a Delaware corporation ("Lessee") modifies and extends that
certain lease of the premises commonly known as 1471 S.W. 12th Avenue, Pompano
Beach, Florida 33069 (the "Leased Premises") as follows:

         WHEREAS, the sublease dated December 29, 1996 by and between William
Jackson and Elizabeth Jackson and Lessee (the "Sublease") was amended by a First
Amendment to Lease (the "First Amendment") executed on or about January 7, 1997
(the sublease as so amended is referred to as the "Lease"); and

         WHEREAS, Lessor and Lessee have agreed to further amend the Lease as
set forth below.

         NOW, THEREFORE, in consideration of the premises and the mutual
promises contained herein and in the Lease, the parties agree as follows:

         1.   Section 1.04 of the Lease is amended to read in its entirety as
              follows: "Property: The entire building located at 1471 S.W. 12th
              Avenue, Pompano Beach, Florida consisting of approximately 13,000
              square feet; provided, however, that until September 1, 1999 the
              Property shall not include the approximately 900 square feet being
              leased to The Steritech Group, Inc.

         2.   Section 1.05 of the Lease is amended to provide that the term of
              the Lease is extended December 31, 2003.

         3.   Section 1.13 is amended to provide that commencing January 1, 1999
              Rent shall be $13,750 per month, plus applicable Florida sales
              tax, payable in advance, provided, however, until September 1,
              1999, the monthly rental shall be $12,850 per month.

         4.   Section 1.15 is amended so that (i) Lessee's option to extend the
              term of the Lease for an additional five (5) years shall be for
              the renewal period commencing January 1, 2004, provided that
              Lessee gives written notice of its intention to extend no later
              than six (6) months before the end of the term. All other
              provisions of Section 1.15 shall remain in effect.

         5.   Section 3.01 is amended to provide that for a calendar year 1999,
              Lessee's monthly payment for real estate taxes shall be $1,661 per
              month and payments for property and casualty insurance and
              maintenance fees shall be $525 per month, provided, however, that
              until September 1, 1999, such payments shall be $1,395.24 and $441
              per month, respectively. The provisions of Section 3.01 providing
              for annual adjustments to the
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              amounts payable by Lessee by reason of increase in real estate
              taxes, insurance and maintenance fees shall remain in full force
              and effect, but only with respect to increases beyond the amounts
              assessed for calendar year 1999.

         6.   Paragraph 2 of the First Amendment (Utilities/Services) shall be
              of no further effect. In its place Section 3.02 of the Sublease
              shall be the effective provision governing the Lease, as of
              January 1,1999, with the following modifications: The last
              sentence of Section 3.02 shall read in its entirety as follows:
              "Lessee shall supply sewer service and such refuse disposal and
              water as is reasonably incident to Lessee's occupancy."

         7.   Section 5.03 is amended by replacing the first sentence of that
              section with the following: "The Lessor, at the expense of the
              Lessor, will keep the roof and the foundation of the Building in
              good and serviceable condition and repair; provided, however, that
              if the roof or foundation of said Building shall become in need of
              repair, it shall be the duty of the Lessee to notify the Lessor of
              such needed repair. The balance of Section 5.03 shall remain in
              full force and effect.

         IN WITNESS WHEREOF, Lessor and Lessee have executed this Second
Amendment to Lease, effective as of the day and year first written above.

         LESSOR:

         1471 BUILDING CORPORATION

         By:
            -----------------------------
         Its:
             ----------------------------

         LESSEE:

         SECURITY ASSOCIATES INTERNATIONAL, INC.

         By: /s/ DANIEL ZITTNO
            -----------------------------
         Its: CFO
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                                                                   EXHIBIT 10.49
                               AMENDMENT AGREEMENT

     AMENDMENT AGREEMENT, executed this 5th day of April, 1999 by and between
Indian Hills Properties, Inc., as "Lessor" and Telecommunications Associates
Group, Inc., a wholly owned subsidiary of Security Associates International,
Inc., as "Lessee."

     WITNESSETH:

     WHEREAS the parties hereto executed a Lease Agreement the 27th day of
November, 1997 for a one-floor store suite located at 1520 East 191st Street,
Euclid, Ohio 44117 consisting of approximately Eight Thousand Four Hundred
(8,400) square feet, more or less, for a term of Seven (7) years (with one [1]
additional Five [5] years option term) commencing the 1st day of January, 1998.

     WHEREAS the base rent for the Seven (7) years of the term was established
at Seventy Nine Thousand Eight Hundred Dollars ($79,800.00) per year, said sum
payable in equal monthly installments of Six Thousand Six Hundred Fifty Dollars
($6,650.00) such base rent increasing to Ninety Two Thousand Four Hundred
Dollars ($92,400.00) per year during the Five (5) years option term.

     WHEREAS Lessee deposited with Lessor a non-interest bearing security
deposit in the amount of Seventy Nine Thousand Eight Hundred Dollars
($79,800.00), three-fourths of which was to be refunded as a rent rebate, in
accordance to a schedule established on an addendum to the Lease Agreement, also
executed on the 24th day of November, 1997.

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     WHEREAS the parties hereto desire and agree to amend and modify the above
referenced Lease Agreement and Addendum to the Lease Agreement to include the
following:

     A. Commencing the 1st day of May, 1999 the term "Demised Premises" shall
     mean the area of the Building leased to the Lessee by the Lessor on a
     parcel of land located at the northwest corner of Euclid Avenue and East
     191st Street in the City of Euclid, County of Cuyahoga and State of Ohio,
     and consisting of approximately Ten Thousand Eight Hundred (10,800) square
     feet, more or less, of a one-floor store suite which is a part of a
     multi-tenant shopping center designated as part of the property outlined in
     red on Exhibit "A-l" attached hereto and made apart hereof, together with
     the building and improvements (Exhibit "A-2") and use of the Common Areas
     all constructed thereon on Lessor's property in Euclid, Ohio.

     B. The term of the Lease Agreement is to be extended for a period of Two
     (2) years until December 31st, 2006 with the one (1) option term being
     reduced to Three (3) additional years.

     C. Commencing the 1st day of May, 1999 the base rent for the Demised
     Premises shall increase to One Hundred Two Thousand Six Hundred Dollars
     ($102,600.00) per year. Thereafter, in the event Lessee shall extend its
     term by exercise of the three (3) year option, the base rent shall be One
     Hundred Eighteen Thousand Eight Hundred Dollars ($118,800.00) per year.

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     D. Commencing with the rent due for the month of May, 1999 and for the next
     Forty One (41) months until the rent due for the month of October, 2002
     Lessor will refund (as a rent rebate) the Seventy Nine Thousand Eight
     Hundred Dollars ($79,800.00) non-interest bearing security deposit in Forty
     Two (42) monthly installments of One Thousand Nine Hundred Dollars
     (1,900.00) each.

NOW, THEREFORE the parties hereto agree as follows:

SECTION 1. The original terms of the Lease Agreement is herein extended by Two
(2) years until December 31st, 2006 with the one (1) term option being reduced
to Three (3) years commencing January 1st, 2007.

SECTION 2. The "Demised Premises" is herein increased to Ten Thousand Eight
Hundred (10,800) square feet from the original Eight Thousand Four Hundred
(8,400) square feet.

SECTION 3. Commencing with the rent due the 1st day of May, 1999 Lessee
covenants and agrees to pay Lessor at Lessor's office or such other place as
Lessor may from time to time designate, as rent for the Demised Premises without
abatement, deduction or set-off and without demand, unless otherwise provided
herein, the sum of One Hundred Two Thousand Six Hundred Dollars ($102,600.00)
per year, said sum to be payable in equal monthly installments of Eight Thousand
Five Hundred Fifty Dollars ($8,550.00), on the first day of each and every month
in advance, during each of the Seven (7) years and Eight (8) months of the term,
and thereafter in the event Lessee shall extend its term by exercise of the
option provided herein, Lessee covenants and agrees to pay Lessor as rent for
the Demised Premises the sum of One Hundred Eighteen Thousand Eight Hundred
Dollars ($118,800.00) per year, said sum to be payable in

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equal monthly installments of Nine Thousand Nine Hundred Dollars (9,900.00), on
the first day of each and every month in advance, during each of the Three (3)
years of such option.

SECTION 4. The Seventy Nine Thousand Eight Hundred Dollars ($79,800.00)
non-interest bearing security deposit shall be refunded to Lessee in Forty Two
(42) monthly installments of One Thousand Nine Hundred Dollars (1,900.00) each.
Such refunding will be in the form of an abatement of One Thousand Nine Hundred
Dollars (1,900.00) per month on the base rent due of Eight Thousand Five Hundred
Fifty Dollars ($8,550.00) reducing the amount payable to Six Thousand Six
Hundred Fifty Dollars ($6,650.00) per month for the months of May, 1999 through
October, 2002. After October, 2002, no security deposit will remain with Lessor.

SECTION 5. As an incentive for Lessee entering into this Amendment Agreement,
Lessor herein agrees to build, at its own cost, the hereunder listed renovations
(Exhibit "A-2") to the Demised Premises:

     I. Existing Facilities:

        a)   Construct new lunchroom/kitchenette in existing file room area
             including Cabinets, Countertop, Sink, Outlets for microwave and
             vending machines. Also including all sewer and plumbing as needed,
             paint, remove existing carpet and clean/polish tile.

        b)   Remove existing wall by computer area.

        c)   Construct new computer room wall with glass door.

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        d)   Install the required electrical outlets (110VAC) for racks of
             receivers and computers in the new computer room and central
             stations.

        e)   Construct new wall with door in new training room area.

        r)   Open divider wall to allow for construction of Supervisor platform
             in central station.

        g)   Construct Supervisor platform in central station.

        h)   Paint all rooms in entire facility.

        i)   Install new carpet in all areas with exception of hallways,
             bathrooms, kitchen areas and breakrooms. In those rooms clean and
             polish tile floors.

        j)   Provide new signage on outside of facility to reflect building
             addresses only.

        k)   Open doorway between existing facility and new facility and install
             door.

    II. New Facility:

        a)   Remove x-ray storage rack.

        b)   Remove existing walls (2) between the four (4) rear offices.

        c)   Remove cabinets on wall as directed.

        d)   Construct new conference room in front area by removing one
             existing wall and construct new wall.

        e)   Provide hallway, with door, between existing facility and new
             facility.

        f)   Install new carpet in all areas to match existing facility carpet
             with the exception of hallway, bathrooms, and kitchen area. In
             those rooms clean and polish tile floors.

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        g)   Paint all rooms in entire facility.

        h)   Provide signage on outside of facility to reflect address only.

All the above renovations shall comply with all local building codes and
regulations and with all U.L. standards for central monitoring stations.

SECTION 6. Lessor shall repair all damage (from both construction and existing
damage) to drop-ceiling, walls and floors as needed. Lessor shall apply its best
efforts to keep the construction areas well ventilated at all times and free of
debris. Maximum efforts will be employed to reduce and/or minimize the necessary
disturbance to Lessee's normal course of business during the construction
period.

SECTION 7. In addition for the above listed renovations Lessor will, at its own
cost, provide workers to assist in the moving of all existing files to new
filing room area and to relocate all existing workstations and furniture to new
areas as needed. All work to be directed and supervised by David Brown and
Robert Koenig of Security Associates International which will be fully
responsible for any damage to computers, workstations and furniture.

SECTION 8. Lessor shall endeavor to complete all renovation work within Sixty
(60) days from the execution of this Agreement by both parties. All completed
renovations shall be subjected to approval and acceptance by the on-site General
Manager, David Brown.

SECTION 9. Except to the extent amended herein, all other terms and conditions
of the Lease Agreement between the parties shall remain in full force and
effect.

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IN TESTIMONY WHEREOF, the Lessor and Lessee have caused this Amendment
Agreement to be signed in triplicate, upon the day and year first above written.

"LESSEE"                                         "LESSOR"

Telecomunications Associates Group, Inc.,        Indian Hills Properties, Inc.
a wholly owned subsidiary of
Security Associates International, Inc.

By:   /s/ Ronald J. Carr                        By:   /s/ Juan Villanueva
    ------------------------------                  -----------------------
      Its President                                   Its President

Agreed as to it:
Security Associates
International, Inc.

By: /s/  James S. Brannen
   -----------------------
    Its President

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