EXHIBIT 4.3


                          AMERICAN UNITED GLOBAL, INC.

                                 Promissory Note

                                                              New York, New York
                                                                 June ____, 1999


             American United Global, Inc., a Delaware corporation (the "Maker"),
for value received, promises to pay, subject to the terms and conditions of this
Note, to Connectsoft  Communications  Corporation or its permitted  assigns (the
"Holder"),  the  principal  sum  of Two  Hundred  Thousand  ($200,000),  without
interest, on June 15, 1999.

         1.  Payments

             1.1  Payments of principal on this Note shall be made to the Holder
at such  place or places  within the United  States as may be  specified  by the
Holder of this Note in a written  notice to the Maker at least two business days
before the payment  date);  provided no payment  shall be due under this Note if
the Buyer and its Affiliate  under the Asset Purchase  Agreement  dated July 10,
1998, as amended (the "Purchase  Agreement")  are in breach of any material term
thereof.

             1.2  Payments  on this Note  shall be made in  lawful  money of the
United  States of America by mailing the Maker's good check in the proper amount
to such  Holder  to  arrive  prior  to or on the due  date  of such  payment  or
otherwise transferring funds so as to be received by such Holder on the due date
of payment.

         2.  Assignment.

                  The Note may not be assigned, pledged or otherwise transferred
or  negotiated  by the Holder  without the prior  written  consent of the Maker;
provided,  however,  that this Note may be  assigned  pursuant  to the  Purchase
Agreement to which the Maker and the initial  Holder are  parties,  to the Buyer
thereunder or its affiliate  EXTEL,  or any  affiliate  thereof,  but may not be
further assigned,  pledged or otherwise  transferred or negotiated by the Holder
to any  non-affiliate  of EXTEL without the prior written  consent of the Maker.
Any purported transfer of this Note in violation of this provision shall be void
and without effect and the purported  transferee  shall acquire no rights in the
Note.






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         3.  Cancellation of Note.

                  Upon  payment in full in  accordance  with Section 1 hereof of
all outstanding  obligations under this Note, the Maker's obligations in respect
of payment of this Note shall terminate and the Holder shall surrender this Note
to the Maker.

         4.  Miscellaneous.

             4.1 Upon receipt of evidence  reasonably  satisfactory to the Maker
of the loss,  theft,  destruction  or mutilation of this Note and of a letter of
indemnity   reasonably   satisfactory   to  the  Maker  and  upon  surrender  or
cancellation  of the Note, if  mutilated,  the Maker will make and deliver a new
Note of like tenor in lieu of such lost, stolen, destroyed or mutilated Note.

             4.2 This Note and the rights and  obligations  of the Maker and any
Holder  hereunder  shall be construed in accordance  with and be governed by the
internal laws of the State of New York.

             4.3 Time is of the essence of this Note. If any  provisions of this
Note or the application  thereof to any person or circumstance  shall be invalid
or unenforceable  to any extent,  the remainder of this Note and the application
of such  provisions  to other  persons or  circumstances  shall not be  affected
thereby and shall be enforced to the greatest extent permitted by law.




                            [Signature on next page]






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


                                   AMERICAN UNITED GLOBAL, INC.


                                     By:______________________________










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