EXHIBIT 99.1



                   Contact: Mimi Englander, Director of Marketing Communications
                            978-975-3700 / menglander@vialog.com



FOR IMMEDIATE RELEASE



                  VIALOG CORPORATION PLANS TO ACQUIRE BY MERGER
                        A BUSINESS CONFERENCE CALL, INC.



Andover,  Mass.,  May 28,  1998 - VIALOG  Corporation  today  announced  that it
entered into a  definitive  merger  agreement to acquire all of the  outstanding
capital stock of A Business  Conference  Call,  Inc.  ("ABCC"),  an  independent
provider of audioconferencing  services,  for approximately $14 million in cash.
Based in Chaska,  Minnesota,  ABCC's 1997 revenues  totaled  approximately  $5.7
million.

The closing of the merger transaction is contingent upon both parties satisfying
the conditions specified in the definitive merger agreement.

VIALOG Corporation is an independent provider of group communications  services,
including   audioconferencing,    videoconferencing,    dataconferencing,    and
teleservices  such as Interactive  Voice Response  (IVR),  broadcast fax and fax
on-demand.

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