<PAGE>

                                   FORM 10-Q

                      SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, DC  20549


(Mark One)

{ X }  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
       EXCHANGE ACT OF 1934


       For the quarterly period ended        September 30, 1999
                                     ---------------------------------


                                      OR


{ }    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES AND
       EXCHANGE ACT OF 1934


For the transition period from
                               _______________________ to ______________________

Commission File Number        0-13716
                      ----------------------------------------------------------


                        NORTH PITTSBURGH SYSTEMS, INC.
--------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)


        Pennsylvania                                  25-1485389
---------------------------------        -----------------------------------
  (State or other jurisdiction of        (I.R.S. Employer Identification No.)
  incorporation or organization)

              4008 Gibsonia Road, Gibsonia, Pennsylvania 15044-9311
--------------------------------------------------------------------------------
                   (Address of principal executive offices)
                                  (Zip Code)

                               724-443-9600
--------------------------------------------------------------------------------
             (Registrant's telephone number, including area code)

                                   No Change
--------------------------------------------------------------------------------
  (Former name, former address and former fiscal year, if changed since last
                                    report)


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities and Exchange Act of 1934
during the preceding 12 months, and (2) has been subject to such filing
requirements for the past 90 days.

                              YES  X       NO____
                                 -----

                      APPLICABLE ONLY TO CORPORATE USERS:

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.

                           Common Stock Outstanding
                           ------------------------

At October 22, 1999, the Registrant had 15,005,000 shares of common stock
outstanding, par value $.15625 per share, the only class of such stock issued.
<PAGE>

                                    PART I
                                    ITEM 1
                             FINANCIAL STATEMENTS
                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED)
                    (Thousands - Except Per Share Amounts)

<TABLE>
<CAPTION>
                                                          For the Three Months        For the Nine Months
                                                             Ended Sept. 30              Ended Sept. 30
                                                          --------------------         ------------------

                                                            1999        1998            1999       1998
                                                          --------     -------         -------    -------
<S>                                                       <C>          <C>             <C>        <C>
Operating revenues:
  Local network services                                   $ 3,461     $ 3,009         $ 9,916    $ 8,817
  Long distance and access services                         11,595      10,972          35,382     33,769
  Directory advertising, billing & other services              619         646           1,992      1,837
  Telecommunication equipment sales                            738         609           2,114      2,035
  Other operating revenues                                   1,144       1,093           3,581      3,206
                                                           -------     -------         -------    -------

     Total Operating Revenues                               17,557      16,329          52,985     49,664


Operating expenses:
  Network and other operating expenses                       8,004       6,767          23,148     19,119
  Depreciation and amortization                              3,502       2,972          10,032      8,792
  State and local taxes                                        769         732           2,339      2,188
  Telecommunication equipment expenses                         642         576           1,901      1,920
                                                           -------     -------         -------    -------

     Total Operating Expenses                               12,917      11,047          37,420     32,019
                                                           -------     -------         -------    -------

   Net Operating Revenues                                    4,640       5,282          15,565     17,645


Other expense (income), net:
  Interest expense                                             607         453           1,616      1,372
  Interest income                                             (242)       (253)           (698)    (1,022)
  Sundry expense (income), net                              (1,276)       (336)         (1,770)    (1,435)
                                                           -------     -------         -------    -------

                                                              (911)       (136)           (852)    (1,085)
                                                           -------     -------         -------    -------

     Earnings before income taxes                            5,551       5,418          16,417     18,730

Income taxes                                                 2,272       2,214           6,667      7,210
                                                           -------     -------         -------    -------

     Net earnings                                          $ 3,279     $ 3,204         $ 9,750    $11,520
                                                           =======     =======         =======    =======

Weighted average common shares outstanding                  15,005      15,005          15,005     15,005
                                                           =======     =======         =======    =======

Basic and diluted earnings per share of
  common stock                                             $   .22     $   .21         $   .65    $   .77
                                                           =======     =======         =======    =======


Dividends per share of common stock                        $   .16     $   .15         $   .48    $   .50
                                                           =======     =======         =======    =======
</TABLE>


    See accompanying notes to condensed consolidated financial statements.

                                       1
<PAGE>

                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS
                            (Thousands of Dollars)
<TABLE>
<CAPTION>
                                                               (Unaudited)
                                                                Sept. 30            Dec. 31
                ASSETS                                            1999               1998
                ------                                        -----------          --------
<S>                                                           <C>                  <C>

Current Assets:
  Cash and temporary investments                                 $ 13,096          $ 16,786
  Marketable securities available for sale                         15,694            14,670

  Accounts receivable:
   Customers                                                        4,600             3,599
   Access service settlements and other                             6,198             7,310
  Prepaid expenses                                                    493               204
  Inventories of construction and operating materials and
   supplies                                                         4,574             4,019
  Prepaid taxes                                                       239                 -
  Prepaid federal and state tax                                       242                 -
                                                                 --------          --------

     Total current assets                                          45,136            46,588
                                                                 --------          --------

  Property, plant and equipment:
   Land                                                               475               475
   Buildings                                                       11,375            11,067
   Equipment                                                      144,141           136,779
                                                                 --------          --------

                                                                  155,991           148,321
  Less accumulated depreciation and amortization                   83,825            78,854
                                                                 --------          --------

                                                                   72,166            69,467
  Construction in progress                                         14,857             6,863
                                                                 --------          --------
     Total property, plant and equipment, net                      87,023            76,330

Investments                                                         9,410             9,637
Deferred financing costs                                              787               857
Prepaid pension cost                                                  669               598
Other assets                                                          937             1,305
                                                                 --------          --------

                                                                 $143,962          $135,315
                                                                 ========          ========

     LIABILITIES AND SHAREHOLDERS' EQUITY
     ------------------------------------

Current liabilities:
  Current portion of long-term debt                              $  2,452          $  1,850
  Accounts payable                                                  7,298             6,756
  Dividend payable                                                  2,401             2,251
  Other accrued liabilities                                         2,104             2,616
  Federal and state income taxes                                        -               920
                                                                 --------          --------

     Total current liabilities                                     14,255            14,393
                                                                 --------          --------

Long-term debt                                                     37,621            32,196

Deferred income taxes                                               9,166             8,060
Accrued postretirement benefits                                     5,095             5,002
Other liabilities                                                   1,743             1,858

Shareholders' equity:
  Capital stock/Common stock                                        2,350             2,350
  Capital in excess of par value                                    2,215             2,215
  Retained earnings                                                71,813            69,265
  Less cost of treasury stock (1999 and 1998-35,000 shares)          (508)             (508)
  Accumulated other comprehensive income-unrealized gain
   on available for sale securities, net                              212               484
                                                                 --------          --------

     Total shareholders' equity                                    76,082            73,806
                                                                 --------          --------

                                                                 $143,962          $135,315
                                                                 ========          ========
</TABLE>

     See accompanying notes to condensed consolidated financial statements.

                                       2
<PAGE>

                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES

               CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                            (Thousands of Dollars)

<TABLE>
<CAPTION>
                                                                          For the Nine Months
                                                                             Ended Sept. 30
                                                                       ---------------------------

                                                                           1999           1998
                                                                       -----------     -----------
<S>                                                                    <C>             <C>
Cash from operating activities:
  Net earnings                                                            $  9,750        $ 11,520
  Adjustments to reconcile net earnings to net cash from
   operating activities:

     Depreciation and amortization                                          10,032           8,792
     Gain on sale of marketable securities                                    (352)              -
     Equity (income) losses of affiliated companies                           (515)         (1,145)
     Changes in assets and liabilities:
      Accounts receivable                                                      111             (85)
      Inventories of construction and operating materials
       and supplies                                                           (555)             57
      Deferred financing costs, prepaid pension cost
       and other assets                                                        367             747
      Prepaid federal and state taxes                                         (481)           (185)
      Accounts payable                                                         542             153
      Other accrued liabilities                                               (627)           (479)
      Accrued postretirement benefits                                           93             179
      Federal and state income taxes                                           370          (2,955)
      Other, net                                                              (250)             63
                                                                          --------        --------

          Total adjustments                                                  8,735           5,142
                                                                          --------        --------

          Net cash from operating activities                                18,485          16,662
                                                                          --------        --------

Cash used for investing activities:
  Expenditures for property and equipment                                  (20,963)        (14,116)
  Net salvage on retirements                                                   199             457
                                                                          --------        --------

          Net capital additions                                            (20,764)        (13,659)
                                                                          --------        --------

  Purchase of marketable securities available for sale                      (8,398)        (14,320)
  Proceeds from sale of marketable securities available for sale             7,271           1,202
  Proceeds from sale of investment                                               -          13,561
  Investments in affiliated entities                                             -            (630)
  Distributions from affiliated entities                                       742              43
                                                                          --------        --------

          Net cash used for investing activities                           (21,149)        (13,803)
                                                                          --------        --------

Cash used for financing activities:
  Cash dividends                                                            (7,052)         (7,353)
  Retirement of debt                                                        (1,383)           (597)
  Proceeds from issuance of new debt                                         7,409               -
                                                                          --------        --------

          Net cash used for financing activities                            (1,026)         (7,950)
                                                                          --------        --------

Net (decrease) increase in cash and temporary investments                   (3,690)          5,091

Cash and temporary investments at beginning of period                       16,786          15,938
                                                                          --------        --------

Cash and temporary investments at end of period                           $ 13,096        $ 10,847
                                                                          ========        ========

Interest paid                                                             $  1,554        $  1,306
                                                                          ========        ========

Income taxes paid                                                         $  6,723        $ 10,225
                                                                          ========        ========

</TABLE>
     See accompanying notes to condensed consolidated financial statements.

                                       3
<PAGE>

                NORTH PITTSBURGH SYSTEMS, INC. AND SUBSIDIARIES
             NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS


(1)  GENERAL
     -------

     The condensed consolidated financial statements included herein have been
     prepared by the Registrant, without audit, pursuant to the rules and
     regulations of the Securities and Exchange Commission.  Consolidated herein
     are the financial results of the Registrant's wholly-owned subsidiaries,
     North Pittsburgh Telephone Company (North Pittsburgh), Penn Telecom, Inc.
     (Penn Telecom) and Pinnatech, Inc. (Pinnatech).  Certain information and
     footnote disclosures normally included in financial statements prepared in
     accordance with generally accepted accounting principles have been
     condensed or omitted pursuant to such rules and regulations.  Nevertheless,
     the Registrant believes that its disclosures herein are adequate to make
     the information presented not misleading and, in the opinion of management,
     all adjustments (which consisted only of normal recurring accruals)
     necessary to present fairly the results of operations for the interim
     periods have been reflected.  These condensed consolidated financial
     statements should be read in conjunction with the financial statements and
     the notes thereto included in the Registrant's latest annual report to the
     Securities and Exchange Commission on Form 10-K.

(2)  COMPREHENSIVE INCOME
     --------------------

     Statement of Financial Accounting Standards No. 130, "Reporting
     Comprehensive Income" (SFAS 130) establishes requirements for disclosure of
     comprehensive income.  The objective of SFAS 130 is to report all changes
     in equity that result from transactions and economic events other than
     transactions with owners.  Comprehensive income is the total of net income
     and all other non-owner changes in equity.  The reconciliation of net
     income to comprehensive income (loss) is as follows (in thousands):


<TABLE>
<CAPTION>
                                   For the Three Months    For the Nine Months
                                      Ended Sept. 30         Ended Sept. 30
                                  ----------------------  ---------------------
                                     1999        1998       1999        1998
                                     ----        ----       ----        ----
     <S>                          <C>            <C>        <C>        <C>

     Net income                      $3,279      $3,204     $9,750     $11,520
     Unrealized gain (loss) on
      marketable securities            (465)        (87)      (272)        (89)
                                     ------      ------     ------     -------
     Comprehensive income            $2,814      $3,117     $9,478     $11,431
                                     ======      ======     ======     =======
</TABLE>


                                    ITEM 2

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS



1.  Financial Condition
    -------------------

    (a)  General
         -------

    There were no material changes in the Registrant's consolidated general
    financial condition from the end of its preceding fiscal year on December
    31, 1998 to September 30, 1999, the end of the nine-month period reported
    herein.


                                       4
<PAGE>

    (b)  Liquidity and Capital Resources
         -------------------------------

    Consolidated capital expenditure commitments for the purchase and
    installation of communications and other equipment at September 30, 1999
    amounted to approximately $5,479,000, with such amount being part of the
    1999 construction program, which is expected to be in excess of $23 million.
    Funds for financing construction expenditures in the nine-month period ended
    September 30, 1999 were generated from internal sources and debt financing.
    Based on its 1999 construction budget and projected cash flows, the
    Registrant anticipates cash flows provided by operating activities and cash
    reserves in 1999 to be sufficient to service long-term debt, to pay
    dividends and to finance approximately 25% to 50% of capital additions. The
    balance of capital additions will be financed from debt financing available
    from the Rural Utilities Service. At September 30, 1999, construction work
    in progress was $14,857,000.

    The Registrant and its subsidiaries have not experienced any difficulty in
    the past meeting either long-term or short-term cash commitments. Cash flow
    generated through regular operations has been adequate to not only finance a
    significant portion of the capital requirements of the Registrant as
    discussed above but also to meet principal and interest payments on long-
    term debt and all working capital requirements. It is anticipated that
    future long-term interest and principal payments will be made from the same
    source of internally generated funds.

    (c)  Regulatory/Competition
         ----------------------

    North Pittsburgh, under Chapter 30 of the Pennsylvania Public Utility Code,
    filed a petition with the Pennsylvania Public Utility Commission (PA PUC),
    on July 31, 1998, seeking approval of an alternative form of regulation to
    replace traditional rate base/rate of return regulation or be subject to a
    show cause proceeding. The petition also included a proposed network
    modernization plan. In the filing, North Pittsburgh proposed a price cap
    plan whereby rates for non-competitive services are allowed to be increased
    based on an index that measures general economy wide price increases. This
    petition is still pending before the PA PUC and may be modified in the final
    order. However, it is not possible at this time to determine the PA PUC's
    disposition of this petition or the effect on North Pittsburgh's financial
    position or results of operations.

    The Federal Communications Commission (FCC) continues to work on Rulemakings
    that will further spell out the specifics of the Telecommunications Act of
    1996 (the 1996 Act). The PA PUC must then finalize its course of action to
    fully implement the 1996 Act, or to the extent possible and permissible,
    change the manner in which such regulations are implemented in Pennsylvania
    before the impact on North Pittsburgh, a Rural Telephone Company under the
    1996 Act, can be fully understood and measured. However, the clear intent of
    the 1996 Act is to open up the local exchange market to competition. The
    1996 Act appears to mandate, among other items, that North Pittsburgh, at
    some point in time, permit the resale of its services at wholesale rates,
    provide number portability, if feasible, provide dialing parity, provide
    interconnection to any requesting carrier for the transmission and routing
    of telephone exchange service and exchange access and provide access to
    network elements. North Pittsburgh was granted a two-year suspension of the
    interconnection requirements of Section 251 of the 1996 Act that expired
    July 10, 1999. In January, 1999, North Pittsburgh filed for an additional
    one-year extension of the suspension until July 10, 2000. In an order
    entered June 25, 1999, the one-year extension of the suspension was
    approved.

    The 1996 Act, FCC and PA PUC regulatory proceedings and the thrust towards a
    fully competitive marketplace have created some uncertainty in respect to
    the levels of the Registrant's revenue growth in the future. However, the
    Registrant, through its subsidiaries, has positioned itself to take
    advantage of the opportunities the 1996 Act presents. The Registrant's
    business plan focuses on expanding its telecommunication services outside
    its traditional service area. Also, its unique location in a growing
    commercial/residential suburban traffic corridor to the north of the City of
    Pittsburgh, its state-of-the-art switching transmission and transport
    facilities and its extensive fiber network place the Registrant in a solid
    position to meet competition and minimize any loss of revenues. In addition,
    the Registrant continues to make its network flexible and responsive to the
    needs of its customers to meet competitive threats. Expansion of services
    outside the traditional territory, new services, access line growth and
    anticipated usage growth are expected to lessen or offset any reductions in
    the Registrant's revenue sources.

2.  Results of Operations
    ---------------------

    Total operating revenues increased $3,321,000 (6.7%) in the nine-month
    period ended September 30, 1999 over the comparable period in 1998. This
    change was due to an increase

                                       5
<PAGE>

     in local network services of $1,099,000 (12.5%), and an increase in long
     distance and access services of $1,613,000 (4.8%). Increased local network
     service revenues were attributable to customer growth, growth in second
     lines and expanded penetration of enhanced services. Higher long distance
     and access services were generally the result of an increase in the number
     of customers and minutes of use.

     Total operating expenses for the nine-month period ended September 30, 1999
     increased $5,401,000 (16.9%) over the preceding year.  That change is
     principally the result of an increase in network and other operating
     expenses of $4,029,000 (21.1%), and an increase in depreciation and
     amortization of $1,240,000 (14.1%).  The increase in network and other
     operating expenses consists of an increase in personnel costs due to an
     expansion of existing business and an increase in personnel and other
     expenses due to start-up activities of Competitive Local Exchange Carrier
     and Internet-related services.  Temporary increases in data processing
     expenses experienced were necessary to maintain both existing and new
     systems during conversion activities and ceased in the third quarter.  The
     increase in depreciation and amortization is the direct result of the
     growth in fixed assets to serve current and future customer needs.  The
     increase in total operating revenues discussed above coupled with the
     increase in total operating expenses resulted in net operating revenues
     decreasing $2,080,000 (11.8%) between 1999 and 1998.

     Interest expense increased $244,000 (17.8%) due to an increased level of
     debt financing in 1999.  Interest income decreased $324,000 (31.7%)
     primarily due to a shift in temporary investments to available for sale
     securities.  The net increase in Sundry income (non-operating) of $335,000
     is primarily due to receipts from a one-time insurance settlement in 1998
     and a decrease in cellular partnership income from 1998 to 1999, offset by
     net realized gains on available for sale securities and a one-time gain
     from a cellular partnership transaction recorded in the third quarter of
     1999.

     The decrease in net operating revenues for the nine-month period ended
     September 30, 1999, in conjunction with the decrease in Sundry income, net,
     resulted in a decrease of $2,313,000 (12.4%) in earnings before income
     taxes.

     The Registrant's effective tax rate was 40% and 38% for the nine-month
     period ended September 30, 1999 and 1998 respectively.  The increase in
     the effective tax rate results from receipt of a non-taxable life insurance
     settlement in the quarter ended March 31, 1998.

     Fluctuations in the revenues and expenses for the three-month period ended
     September 30, 1999, as compared to the same quarterly period in 1998 are
     generally attributable to the same reasons above in the year-to-date
     comparisons.

3.   New Accounting Pronouncements
     -----------------------------

     In June, 1998, the Financial Accounting Standards Board issued SFAS No.
     133, "Accounting for Derivative Instruments and Hedging Activities". The
     Pronouncement is effective the Registrant's year beginning January 1, 2001.
     The Registrant does not expect this pronouncement to impact the
     consolidated financial statements because the Registrant has not entered
     into derivative or hedging transactions.

     Statement of Position 98-1 (SOP 98-1), "Accounting for the Costs of
     Computer Software Developed or Obtained for Internal Use", has been adopted
     by the Registrant effective January 1, 1999.  SOP 98-1 provides guidance on
     capitalizing costs of computer software developed or obtained for internal
     use.  SOP 98-1 did not have a material effect on its financial statements.

4.   Year 2000
     ---------

     (a)  State of Readiness
          ------------------

     The Registrant has taken actions to understand the nature and extent of the
     work required in order to make its systems and infrastructure Year 2000
     compliant.  The Registrant began work last year to prepare its information
     technology (IT) and non-information technology (non-IT) systems, including
     updating and/or replacing existing legacy systems.  The Registrant has
     formed a Corporate Year 2000 Task Force, which is responsible for all Year
     2000 activities and is being monitored by senior management and the Board
     of Directors.

     There are six phases of the Registrant's Year 2000 program: Awareness,
     Inventory, Assessment, Renovation, Validation and Implementation.  The
     Registrant has defined the six phases as follows:

                                       6
<PAGE>

     Awareness - Gain the commitment of management and staff to solving the
     problem.  This phase has been completed.

     Inventory - Conduct a thorough inventory of all hardware and software
     systems.  This phase will run until December, 1999 in order to maintain the
     inventory throughout the life of the project.

     Assessment and Planning - Decide which systems to retire, repair or
     replace.  Prepare contingency plans.  This phase has been completed.

     Renovation - Perform upgrades to hardware and software.  The Registrant has
     contracted to outsource certain operational support, billing and accounting
     systems to a third party vendor.  The software and hardware components of
     the systems selected have been certified by the vendor as Year 2000
     compliant.  The Registrant has completed the remediation of all mission
     critical systems at this time.  The Renovation is now 98% complete.  The
     remaining 2% of non-mission critical systems are scheduled to be remediated
     in advance of December, 1999.

     Validation - Test and certify new and renovated systems.  This phase is
     underway; however, due to the introduction of several new product
     technologies, final testing will not be completed until the end of
     November, 1999.  This phase is currently 90% complete.

     Implementation and Follow-up - New or renovated systems go into service.
     This phase is scheduled to be completed in December, 1999, and will include
     the resolution of any outstanding problems.  The Year 2000 Project will
     extend until March, 2000 in order to address the leap day of February 29,
     2000 and to address any outstanding issues.

     The Registrant's Year 2000 issues related to third parties can be broken
     into two categories: third party vendors who supply products to the
     Registrant, and other telecommunications companies who provide joint
     service to our customers.  The third party vendors have been providing the
     Registrant with Year 2000 solutions on an on-going basis.  Year 2000
     upgrades, repairs and testing are being performed as per vendor
     specifications.  Other telecommunications service providers are
     implementing Year 2000 programs in much the same fashion as the Registrant
     and industry testing is being performed on an on-going basis.

     (b)  Cost to Address Year 2000 Issues
          --------------------------------

     Expenditures related to Year 2000 remediation, the data processing
     transition plan, license fees for purchase of software and training and
     implementation costs are not expected to exceed $3.5 million, $3.3 million
     of which has been incurred through September 30, 1999.  Costs related to
     implementation of new systems are being capitalized, in accordance with SOP
     98-1, and will be amortized over the estimated useful life of the asset.
     The remainder of these costs, including Year 2000 remediation costs,
     are being expensed as incurred.

     (c)  Risks of Year 2000 Issues
          -------------------------

     The most reasonably likely worst case scenario is loss of services to other
     interconnecting companies who have not attained Year 2000 compliance.  This
     is unlikely to occur since the interconnecting companies realize their
     responsibility to comply.  However, should this worst case scenario occur,
     the Registrant will give customers the option of rerouting service to a
     working carrier.

     (d)  Contingency Plan
          ----------------

     The Registrant has developed a Corporate Year 2000 Contingency Plan to
     cover its primary business activities.  This plan outlines the key areas of
     business, and the manner in which they will be supported in the event of a
     Year 2000 failure.  This plan has been developed as a result of research
     into United States Telephone Association member telephone company responses
     to hurricanes, tornadoes, ice storms and other disasters.  The Registrant
     has studied and modified these plans to cover operations during potential
     Year 2000 related failures.  Testing and certification of the Registrant's
     Contingency Plan has been completed.  The Registrant has also updated and
     revised the existing Emergency Response Plan.  The Registrant's Emergency
     Response Plan will form the core of the Registrant's Contingency Plan if a
     major service outage should occur.

                                       7
<PAGE>

     Key components of the Contingency Plan are the preparations to revert to a
     manual operation, stockpiling and conservation of materials, increased
     staffing levels, data storage for processing at a later date, isolation of
     harmful network elements and positioning key personnel in areas where they
     will be most effective.  Should there be a serious service affecting
     problem, the Emergency Response Plan will be activated until all services
     are restored.  Events, which could trigger activation of the Emergency
     Response Plan, include widespread loss of gas or electric service, failures
     at various interconnecting companies or failure of internal switching or
     transmission systems.



                                    ITEM 3

                   QUANTITATIVE AND QUALITATIVE DISCLOSURES

                               ABOUT MARKET RISK



1.   There have been no material changes in reported market risks faced by the
     Registrant since December 31, 1998.

                                       8
<PAGE>

                                   SIGNATURES



     Pursuant to the requirements of the Securities and Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                                    NORTH PITTSBURGH SYSTEMS, INC.
                                    ------------------------------
                                             (Registrant)



Date      11/1/1999                   /s/  H. R. Brown
     ____________________            ________________________________
                                     H. R. Brown, President



Date      11/1/1999                   /s/  A. P. Kimble
     ____________________            ________________________________
                                     A. P. Kimble, Vice President & Treasurer

<PAGE>

                                    PART II

                               OTHER INFORMATION




Item 6.  Exhibits and Reports on Form 8-K
         --------------------------------

         (a) Exhibits - Exhibit Index for Quarterly Reports on Form 10-Q.
             --------
<TABLE>
<CAPTION>
Exhibit
Number                       Subject                         Applicability
------                       -------                         -------------
<S>          <C>                                      <C>

 (2)         Plan of acquisition, reorganization,     Not Applicable
             arrangement, liquidation or
             succession

 (3) (i)     Articles of Incorporation                Provided in Quarterly Report
                                                      on Form 10-Q for the quarter
                                                      ended June 30, 1996 and
                                                      Incorporated Herein by
                                                      Reference.

 (3) (ii)    By-Laws                                  Provided in Annual Report
                                                      on Form 10-K for the year
                                                      ended December 31, 1998
                                                      and Incorporated Herein by
                                                      Reference.

 (4)         Instruments defining the rights of       Provided in Registration of
             security holders including indentures    Securities of Certain
                                                      Successor Issuers on Form
                                                      8-B filed on June 25, 1985
                                                      and Incorporated Herein by
                                                      Reference.

 (10)        Material Contracts                       Attached Hereto

 (11)        Statement of computation of              Attached Hereto
             earnings per share.

 (15)        Letter re unaudited interim financial    Not Applicable
             information

 (18)        Letter re change in accounting           Not Applicable
             principles

 (19)        Report furnished to security holders     Not Applicable

 (22)        Published report regarding matters       Not Applicable
             submitted to a vote of security holders

 (23)        Consents of experts and counsel          Not Applicable

 (24)        Power of attorney                        Not Applicable

 (27)        Financial Data Schedule                  Attached Hereto

 (99)        Additional exhibits                      Not Applicable
</TABLE>

         (b) Reports on Form 8-K - No reports on Form 8-K were filed during the
             -------------------
             quarter ended September 30, 1999.