PSINet Expands Access in Washington and Oregon

[Dave Smith]

FOR IMMEDIATE RELEASE

CONTACT: Martin L. Schoffstall
Vice President & CTO
Performance Systems International, Inc.
Suite 1100
11800 Sunrise Valley Drive
Reston, VA 22091
Voice: 1.800.82psi82
+1.703.620.6651
FAX: +1.703.620.4586
E-Mail: in...@psi.com

PSINet(R) EXTENDED THROUGHOUT THE PACIFIC NORTHWEST

Reston, VA - November 18, 1992 - Performance Systems International, Inc.
(PSI) today announced an expansion of its wide area network, PSINet, in the
Pacific Northwest. PSI has signed an agreement with DigiNet Telecommunications,
of Mercer Island, Washington, to provide its interorganizational frame relay
service, InterFrame, to additional cities including:

Eugene, OR Olympia, WA
Hermiston, OR Spokane, WA
Salem, OR Yakima, WA
and the Tri-Cities area of Washington

The agreement will also allow PSI to improve its services in the Seattle, WA
and Portland, OR areas where PSI has operated now for over a year.

InterFrame is PSI's next generation wide area internetwork service that
provides access to the global TCP/IP Internet using state-of-the-art frame
relay technology. PSI has deployed Cascade Communication Corp.'s STDX family
of frame relay switches into its national network backbone to provide the
service.

The relationship between PSI and DigiNet will create the first
Network-to-Network Interface (NNI) between frame relay service providers
in the nation. Dick Stroup, President of DigiNet commented, "We are
very pleased to be able to team up with PSI to provide InterFrame service
in the Pacific Northwest. The fact that both of our networks employ
Cascade Communications' STDX frame relay switches considerably simplifies
the interface."

Daniel E. Smith, President and CEO of Cascade Communications Corp. added,
"Frame relay service spanning multiple carriers is the key to satisfying
customers' ubiquitous connectivity needs. Cascade is proud to work with
DigiNet Telecommunications and PSI to enable the first intercarrier frame
relay service using the NNI standard."

PSI's InterFrame service is available in the following U.S. cities outside
of Washington and Oregon states:

Akron, OH Houston, TX Raleigh, NC
Albany, NY Indianapolis, IN Reston, VA
Atlanta, GA Iowa City, IA Richmond, VA
Augusta, GA Jacksonville, FL Rochester, NY
Baltimore, MD Joplin, MO Salt Lake City, UT
Baton Rouge, LA Kansas City, KS San Francisco, CA
Beaumont, TX Las Vegas, NV Santa Clara, CA
Boise, ID Longview, TX Savannah, GA
Boston, MA Los Angeles, CA Shreveport, LA
Buffalo, NY Miami, FL South Bend, IN
Cedar Rapids, IA Minneapolis, MN Springfield, MA
Chattanooga, TN Mobile, AL Stamford, CT
Chicago, IL Montgomery, AL St. Louis, MO
Cleveland, OH Nashville, TN Syracuse, NY
Columbia, MO Newark, NJ Tampa, FL
Columbia, SC New Orleans, LA Toledo, OH
Dallas, TX New York, NY Topeka, KS
Davenport, IA Oklahoma City, OK Trenton, NJ
Denver, CO Omaha, NE Tulsa, OK
Des Moines, IA Orlando, FL Washington, DC
Detroit, MI Philadelphia, PA West Palm Beach, FL
Evansville, IN Phoenix, AZ White Plains, NY
Hartford, CT Pittsburgh, PA Wichita, KS

PSI, Inc., headquartered in Reston, Virginia, is a value-added internetworking
service provider with a wide spectrum of services for the individual and
corporate user of electronic information. Services range from electronic
mail products to turnkey integration of local area networks into the PSINet
wide area network system and the Internet.

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trademarks of their respective owners.