

HAYES MICROCOMPUTER PRODUCTS, INC.
P.O. Box 105203
Atlanta, Georgia  30348                   FOR IMMEDIATE RELEASE
404/449-8791    H-1689
Peggy Ballard/Beth Logan


         HAYES SUPPORTS V.42bis STANDARD APPROVED BY THE CCITT                      
 
        ATLANTA, GA., October 2, 1989 - Hayes Microcomputer Products,
Inc. today announced support of CCITT V.42bis for the company's 
V-series system products.  This announcement signifies the company's 
immediate product response to the newest standard for advanced features
in modems, which was approved by the CCITT Study Group XVII on 
September 29, 1989.
  
        V.42bis specifies the data compression technique used to
increase throughput of modems incorporating the LAPM error-control 
protocol, bringing an average of three-to-one data compression 
capabilities and as much as four-to-one on some files to the V-series 
system products.  The standard is based on the popular Lempel-Ziv 
compression algorithm developed by AT&T Bell Laboratories, and includes
enhancements proposed by IBM, British Telecom PLC, and Hayes.

        In addition, Hayes has signed a letter of intent to enter into
a patent license agreement with Unisys Corporation.  Terms of the 
agreement call for a one-time license fee under Unisys' U.S. Patent 
4,558,302, which was named for the inventor who first encouraged use of
Lempel-Ziv technology earlier in the decade.  Unisys' timely response 
to licensing requests following the CCITT's approval of V.42bis 
combined with the company's nominal fee made it possible for Hayes to 
utilize this technology.
        
        Beginning December 1, customers who currently have V-series
system products with V.42 may upgrade to V.42bis through Hayes Customer
Service.  If the product was purchased prior to September 1, there will
be a $50 charge for the upgrade.  Anyone purchasing the product after 
September 1, or anyone who has previously upgraded the V-series system 
product to V.42 will receive the upgrade at no cost.
        
        For more information concerning Hayes products and upgrades, or
for the Hayes Advanced Systems Dealer nearest you, contact Hayes 
Customer Service at 404/441-1617.
 
        Best known as the leader in the microcomputer modem market,
Hayes develops, supplies and supports computer communications equipment
and software for personal computer and computer communication networks.
The company distributes its products through an international network 
of authorized dealers, resellers, system integrators and original 
equipment manufacturers.
 
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