Exhibit 4.1


                             SUBORDINATED PROMISSORY NOTE
                             ----------------------------




     $1,283,332.40                                             March 27, 1997



               FOR VALUE RECEIVED, the undersigned, FIRECOM, INC., a New York
     corporation with principal offices at 39-27 59th Street, Woodside, New York
     11377 ("Maker"), hereby promises to pay to the order of NORWOOD VENTURE
     CORP., a Delaware corporation with principal offices at 1430 Broadway,
     Suite 1607, New York, New York 10018, ("Holder"), in lawful money of the
     United States of America and in immediately available funds, the aggregate
     amount of ONE MILLION, TWO HUNDRED EIGHTY-THREE THOUSAND, THREE HUNDRED
     THIRTY-TWO DOLLARS AND FORTY CENTS ($1,283,332.40) together with interest
     thereon calculated from the date hereof in accordance with the provisions
     of this Note.  Payments on this Note are to be made at Holder's address
     stated above, or such other address as duly designated by Holder, in lawful
     money of the United States of America.

               This Note is being issued and delivered by Maker to Holder, in
     accordance with the terms and provisions of the Purchase Agreement of even
     date herewith (the "Purchase Agreement") between Maker and Holder, pursuant
     to which Maker is purchasing from Holder 583,331 shares of common stock,
     $.01 par value per share (the "Common Stock"), of Maker and warrants to
     purchase an additional 750,002 shares of Common Stock for an aggregate
     purchase price of $1,604,165.50.

               This Note shall bear interest at the rate of 10% per annum. 
     Principal and interest on this Note shall be payable over six (6) years in
     twenty-four (24) level, quarterly installments of $71,754.73 each,
     commencing on June 27, 1997, and continuing on the 27th day of each
     September, December, March and June thereafter, with a final payment due on
     March 27, 2003 (the "Maturity Date").  Principal and interest on such
     monthly payments shall be allocated in accordance with Schedule A annexed
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     hereto.  Any and all overdue installments shall bear interest at the rate
     of 13% per annum until paid in full.

               All payments due under this Note shall be subordinate to certain
     Senior Debt, in accordance with the terms and provisions of a subordination
     agreement of even date herewith among The Chase Manhattan Bank, Maker and
     Holder (the "Subordination Agreement").  For purposes of this Note, the
     terms "Senior Debt" and "Senior Creditor" shall have the respective
     meanings ascribed to them in the Subordination Agreement.

               This Note may be prepaid, in whole or in part, at any time by
     Maker with prepayments to be applied to the next scheduled payments in
     accordance with Schedule A, and then, with respect to any such payment,
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     first to interest and then to principal.

               The occurrence of any one or more of the following events shall
     constitute an event of default under this Note (an "Event of Default"),
     provided, with respect to the events described in (a) or (b) below only, it
     is not cured within fifteen (15) days of such event or waived:

                    (a) any payment due on this Note is not paid when due; or

                    (b) default is made in the performance or observance of any
     covenant, agreement or provision to be performed or observed by Maker under
     this Note or the Purchase Agreement; or

                    (c)  (i) Maker shall commence any case, proceeding or other
     action (A) under any existing or future law of any jurisdiction, domestic
     or foreign, relating to bankruptcy, insolvency, reorganization or relief of
     debtors, seeking to have an order for relief entered with respect to Maker,
     or seeking to adjudicate it as bankrupt or insolvent, or seeking
     reorganization, arrangement, adjustment, winding-up, liquidation,
     dissolution, composition or other relief with respect to its debts, or (B)
     seeking appointment of a receiver, trustee, custodian or other similar
     official for Maker or for all or any substantial part of its assets, or
     Maker shall make a general assignment for the benefit of its creditors; or

                         (ii) there shall be commenced against Maker any case,
     proceeding or other action of a nature referred to in clause (i) above
     which (Y) results in the entry of an order for such relief or any such
     adjudication or appointment or (Z) remains undismissed, undischarged or
     unbonded for a period of sixty (60) days; or

                         (iii) there shall be commenced against Maker any case,
     proceeding or other action seeking issuance of a warrant of attachment,
     execution, distraint or similar process against all or any substantial part
     of its assets which results in the entry of an order for any such relief
     which shall not have been vacated, discharged, or stayed or bonded pending
     appeal within sixty (60) days from the entry thereof; or

                         (iv) Maker shall take any action in furtherance of, or
     indicating its consent to, approval of, or acquiescence in, any of the acts
     set forth in clauses (c)(i), (ii) or (iii) above.

               If an Event of Default shall have occurred, then, and in each and
     every such case, the full amount of this Note, including all accrued and
     unpaid interest hereon, shall be immediately due and payable (in the case
     of events described in clauses (a) and (b) above, upon declaration by the
     Holder), such amount becoming so due and payable without presentation,
     protest or further demand or notice of any kind, all of which are hereby
     expressly waived, and Holder shall be entitled to receive, to the extent
     lawful, reasonable attorneys' fees for the collection of such amount.

               In the event that, for any reason, Paul Mendez ceases to serve as
     the Chief Executive Officer of Maker, Maker covenants that, within 120 days
     from such cessation, it will select a new Chief Executive Officer and will
     notify Holder of such selection.  If, in its discretion, Holder is
     dissatisfied with the selection of the new Chief Executive Officer made by
     Maker, Holder will have an option, exercisable for 180 days from the date
     such new Chief Executive Officer takes office, to require Maker to prepay
     this Note in full (including all unpaid principal and interest) six months
     from the time Holder notifies Maker in writing of Holder's exercise of such
     option.

               Maker hereby covenants that for such time as amounts are
     outstanding under this Note, Maker shall make any cash payments with
     respect to any shares of the Series A Preferred Stock, par value $1.00 per
     share, of Maker (the "Preferred Stock"), only in accordance with the
     following limitations (the "Cash Limitations"), subject, however, to the
     restrictions imposed by the terms of the Senior Debt:

                    (a)  Maker shall pay dividends on the Preferred Stock
                         (including accrued but unpaid dividends and current
                         dividends) in cash only from Available Net Income.  For
                         purposes of this Note, Available Net Income shall mean
                         100% of net income earned by Maker beginning February
                         1, 1997 and thereafter, less any amounts paid with
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                         respect to the Preferred Stock (whether in the form of
                         dividends, redemption payments or repurchase payments)
                         from February 1, 1997 to the date of the payment for
                         which the determination of Available Net Income is
                         being made; and

                    (b)  Maker shall redeem or repurchase Preferred Stock with
                         cash only from 50% of Available Net Income as of the
                         date of such redemption or repurchase.

               Notwithstanding the foregoing Cash Limitations, Maker shall be
     permitted to make payments with respect to the Preferred Stock (whether in
     the form of dividends, redemptions or repurchases) in amounts in excess of
     Available Net Income at the time of such payment (an "Excess Payment"),
     subject, however, to the restrictions imposed by the terms of the Senior
     Debt and provided that:
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                    (a)  any such Excess Payment is made through the issuance of
                         notes subordinate in right of payment to this Note; and

                    (b)  such subordinated notes are serviced only to the extent
                         of 50% of Available Net Income.

               The foregoing shall not preclude Maker from exchanging such
     Preferred Stock for Common Stock or for other classes or series of capital
     stock of Maker (provided, however, that the restrictions on dividends and
     redemptions shall apply to any stock for which such Preferred Stock is
     exchanged).

               As an inducement to Holder to accept this Note from Maker in
     accordance with the terms of the Purchase Agreement, Maker hereby covenants
     that for such time as amounts are outstanding under this Note, Maker will
     not, in connection with the incurrence of debt other than any debt obtained
     from the Senior Creditor, or its successors and/or assigns, agree with the
     lender of such debt to design events of default under such debt with a view
     to avoiding the payment of amounts due under this Note in accordance with
     its terms.

               Maker hereby covenants that if, at any time while this Note is
     outstanding, Maker ceases to be required under the Securities Exchange Act
     of 1934 (the "Exchange Act") to file periodic reports with the Securities
     and Exchange Commission, it will furnish to Holder (i) within 45 days from
     the end of each of the first three quarters of each fiscal year of Maker,
     financial statements of the nature required to be filed by Form 10-Q under
     the Exchange Act for each such fiscal quarter and (ii) within 90 days from
     the end of each fiscal year of Maker, audited financial statements for each
     such fiscal year.

               Any notice, presentation or demand to or upon Maker in respect of
     this Note may be given or made in writing to the address set forth above,
     and shall be deemed to be duly given if personally delivered with receipt
     acknowledged, if mailed by registered or certified mail, first class,
     postage prepaid, or if delivered by a nationally recognized overnight
     courier service to such address, or, if any other address shall at any time
     be designated for this purpose by Maker in writing to Holder, to such other
     address.

               The provisions of this Note shall be construed and interpreted,
     and all rights and obligations hereunder determined, in accordance with the
     laws of the State of New York, without reference to the conflict of laws
     principles thereof.

               This Note shall bind Maker and its successors and assigns, and
     shall inure to the benefit of Holder and its successors and assigns.

               IN WITNESS WHEREOF, Maker has duly executed this Note on the day
     and year first above written.

                                   FIRECOM, INC.

                                   By:  /s/ Paul Mendez
                                      --------------------------------------
                                   Name:  Paul Mendez
                                   Title:  President