ASSUMPTION, CONSENT AND WAIVER AGREEMENT

                  WHEREAS BCB Voice Systems Inc. (the "Transferee"), proposes to
acquire from Working Ventures Canadian Fund Inc. (the "Transferor") 7,300 Common
Shares (the "Subject Shares") of International Neural Machines Inc. (the
"Corporation") pursuant to the terms of a purchase agreement to be executed
concurrently with this Assumption Agreement;

                  AND WHEREAS the transfer of the Subject Shares is governed by
the terms and conditions of a unanimous shareholders' agreement dated March 20,
1997 among the Corporation, the Transferor, Oleg Feldgajer and Aleksander Szlam
(the "Unanimous Shareholders' Agreement");

                  AND WHEREAS pursuant to paragraph 7.1(d) of the Unanimous
Shareholders' Agreement, the transfer of the Subject Shares is conditional upon
the Transferee entering into an agreement with the other parties to the
Unanimous Shareholders' Agreement, agreeing to be bound the terms thereof;

                  NOW THEREFORE this agreement witnesses that, in consideration
of the provisions set out below, the acquisition of the Subject Shares and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

1.   Any capitalized term used, but not defined shall have the meaning set out
     in the Unanimous Shareholders' Agreement.

2.   The Transferee hereby consents to the terms and conditions of the Unanimous
     Shareholders' Agreement and agrees to assume all of the obligations of the
     Transferor thereunder as they relate to the Subject Shares, as though the
     Transferee was the Transferor and had been an original signatory to the
     Unanimous Shareholders' Agreement.

3.   The Transferee hereby acknowledges receipt of a copy of the Unanimous
     Shareholders' Agreement.

4.   The Transferee hereby advises that its address and fax no. for purposes of
     section 11.2 of the Unanimous Shareholders' Agreement is as follows:

                                    BCB Voice Systems Inc.
                                    290 Riviera Drive
                                    Markham, Ontario  L3R 5M1

                                    Attention:  Terry Graham
                                    Tel:    905-948-8266
                                    Fax:    905-948-8276

5.   Each of the parties to the Unanimous Shareholders' Agreement consent to the
     transfer from the Transferor to the Transferee referred to herein and waive
     all rights such parties may have




     thereunder with respect to such transfer, including without limitation
     under Article 7 of the Unanimous Shareholders' Agreement.


6.   This agreement shall enure to the benefit of the parties and their
     respective heirs, executors, administrators, legal personal
     representatives, successors (including, without limitation, any successor
     by reason of amalgamation of any party) and permitted assigns. Neither this
     agreement nor any rights or obligations hereunder shall be assignable by
     any party except pursuant to the provisions of the Unanimous Shareholders'
     Agreement.


                  IN WITNESS WHEREOF the parties have executed this agreement
effective as of April 17, 2000.

                           BCB VOICE SYSTEMS INC.


                           By:      (Signed)  "Terry Graham"
                              --------------------------------

                           INTERNATIONAL NEURAL
                           MACHINES INC.

                           By:      (Signed)  "Oleg Feldgajer"
                              ---------------------------------
                           Name:    Oleg Feldgajer
                           Title:   President


                           WORKING VENTURES CANADIAN
                           FUND INC.

                           By:      (Signed)  "Donald Morrison"
                              ----------------------------------
                           Name:    Donald Morrison
                           Title:   Vice President


Witness:

- ---------------------     (Signed)  "Oleg Feldgajer"
                          ---------------------------------------
                          OLEG FELDGAJER

Witness:

- ---------------------     (Signed)  "Aleksander Szlam"
                          ---------------------------------------
                          ALEKSANDER SZLAM