EXHIBIT 2.1(A)

                                   REVOLVING CREDIT NOTE

$25,000,000
                                                                  July 31, 1997

            This  Revolving  Credit Note is  executed  and  delivered  under and
pursuant to the terms of that certain  Revolving  Credit and Security  Agreement
dated as of July 31, 1997 (as amended,  supplemented,  restated or modified from
time to time, the "Loan Agreement") by and among TRESCOM INTERNATIONAL,  INC., a
Florida  corporation,   TRESCOM  U.S.A,  INC.,  a  Florida  corporation,   INTEX
TELECOMMUNICATIONS,  INC., a South Carolina Corporation,  THE ST. THOMAS AND SAN
JUAN TELEPHONE COMPANY, INC., a U.S. Virgin Island Corporation and STSJ OVERSEAS
TELEPHONE COMPANY,  INC. (d/b/a TresCom P.R.), a Puerto Rico corporation (each a
"Borrower"  and jointly and  severally,  the  "Borrowers"),  PNC BANK,  NATIONAL
ASSOCIATION ("PNC"), the various other financial  institutions named in or which
hereafter become a party to the Loan Agreement (together with PNC, collectively,
the  "Lenders")  and PNC as  agent  for  Lenders  (in such  capacity,  "Agent").
Capitalized  terms not  otherwise  defined  herein  shall have the  meanings  as
provided in the Loan Agreement.

            FOR VALUE RECEIVED,  Borrowers hereby jointly and severally  promise
to pay to the order of Agent for the  ratable  benefit  of  Lenders  at  Agent's
offices located at Two Tower Center, East Brunswick, New Jersey 08816 or at such
other place as holder may from time to time designate to Borrowers in writing:

            (i) the  principal  sum of TWENTY FIVE  MILLION  AND 00/100  DOLLARS
($25,000,000)  or, if  different  from such  amount,  such  amount of  Revolving
Advances as may be due and owing under the Loan Agreement, payable in accordance
with the provisions of the Loan Agreement and subject to  acceleration  upon the
occurrence  and of an Event of  Default  under  the Loan  Agreement  or  earlier
termination of the Loan Agreement pursuant to the terms thereof; and

            (ii) interest on the principal amount of this Note from time to time
outstanding,  payable at the  applicable  Revolving  Interest Rate in accordance
with the provisions of the Loan  Agreement.  Upon and after the occurrence of an
Event of Default, and during the continuation thereof, interest shall be payable
at the Default Rate. In no event,  however,  shall  interest  exceed the maximum
interest rate permitted by law.

            This  Note is the  Revolving  Credit  Note  referred  to in the Loan
Agreement and is secured,  INTER ALIA, by the liens granted pursuant to the Loan
Agreement  and the Other  Documents,  is  entitled  to the  benefits of the Loan
Agreement and the Other Documents and is subject to all of the agreements, terms
and conditions therein contained.

            This Note may be  voluntarily  prepaid,  in whole or in part, on the
terms and conditions set forth in the Loan Agreement.

            If  an  Event  of  Default  under Section 10.7 of the Loan Agreement
shall occur,  then this Note shall immediately  become due and payable,  without
notice,  together with reasonable  attorneys'  fees if the collection  hereof is
placed in the hands of an attorney to obtain or enforce payment hereof. If


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any other Event of Default  shall occur under the Loan  Agreement  or any of the
Other  Documents,  which is not cured within any applicable  grace period,  then
this Note may, as provided in the Loan Agreement,  be declared to be immediately
due and payable,  without notice,  together with reasonable  attorneys' fees, if
the collection hereof is placed in the hands of an attorney to obtain or enforce
payment hereof.

            This Note shall be governed by and construed in accordance  with the
laws of the State of New York.

            Borrowers expressly waive any presentment,  demand,  protest, notice
of  protest,  or notice of any kind  except as  expressly  provided  in the Loan
Agreement.

                              TRESCOM INTERNATIONAL, INC.


                              By:/s/ William Paquin
                                 ---------------------------
                              Name: William Paquin
                              Title: Chief Financial Officer


                              TRESCOM U.S.A., INC.
                              INTEX TELECOMMUNICATIONS, INC.
                              THE ST. THOMAS AND SAN JUAN TELEPHONE
                                    COMPANY, INC.
                              STSJ OVERSEAS TELEPHONE COMPANY, INC.


                              By:/s/ William Paquin
                                 ---------------------------
                              Name:    William Paquin
                              Title:   Vice President of each of the foregoing
                                       corporations


STATE OF NEW YORK       )
                        :  ss.:
COUNTY OF NEW YORK      )

      On the 31st day of July,  1997,  before me personally came William Paquin,
to me known,  who being by me duly sworn, did each depose and say that he is the
Chief Financial Officer of TresCom International, Inc. and the Vice President of
each of Trescom U.S.A., Inc., Intex Telecommunications, Inc., The St. Thomas and
San Juan  Telephone  Co., Inc. and STSJ Overseas  Telephone  Company,  Inc., the
corporations described in and which executed the foregoing instrument;  and that
he  signed  his  name  thereto  by  order  of the  board  of  directors  of said
corporations.


                                          /s/ Loukia Harris
                                    -------------------------------
                                              Notary Public



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