Corsair to Deploy PhonePrint Fraud Control System for Centennial Cellular Corp.; Agreement will put RF fingerprinting in Indiana, Michigan and Louisiana properties.

PALO ALTO, Calif.--(BUSINESS WIRE)--Sept. 27, 1996--Corsair Communications announced today that it has reached a contract agreement with Centennial Cellular Corp. to deploy its PhonePrint cellular fraud prevention system in all of Centennial's properties across the country.

Under the contract's terms, the system will be installed by the end of this year. PhonePrint uses an advanced technology known as radio frequency (RF) fingerprinting to detect and disconnect calls from cloned cellular phones as they are placed.

According to Tom Cogar, Centennial's vice president of engineering, Centennial has been monitoring the industry's increasing acceptance of RF fingerprinting over the past year.

"Based on the results we've seen in other markets, we're convinced that this system will help us provide a substantial new level of protection for our customers," said Cogar. "We can also protect our subscribers against fraud in markets in the U.S. by sharing the RF prints on a real-time basis with other PhonePrint users."

Corsair vice president of marketing and sales David Thompson credited PhonePrint's success in the nation's largest cellular markets, where it has reduced fraud significantly.

"I expect PhonePrint to prove its effectiveness at preventing fraud wherever it's needed," said Thompson. "Centennial is providing us a prime opportunity to show that this is as true in smaller markets as it is in the larger ones, where most of our installations have taken place so far."

PhonePrint uses signal intelligence technology to "fingerprint" the radio signal emitted by cellular phones. Based on that fingerprint, the system can distinguish individual phones, spotting clones instantly as they attempt to place calls. When PhonePrint detects a clone, it disconnects the call within seconds.

Centennial Cellular Corp. operates wireless systems in four clusters located in the Midwest, Gulf Coast, Southwest, and Puerto Rico. Their current holdings of ten million POPs makes them the twentieth largest wireless carrier in the United States.

Founded in 1994, Corsair Communications, Inc. uses its core expertise in signal analysis and distributed systems to develop and provide technology-intensive application solutions to the wireless telecommunications industry. Corsair's PhonePrint system is the cellular industry's most widely used RF-based fraud prevention system.

CONTACT: Corsair Communications, Inc.

Bill Taliaferro, 415/842-3263

or

Centennial Cellular Corp.

Jim Frost, 219/436-9890