To: StockMan who wrote (13343 ) 4/14/1998 7:02:00 PM From: Maverick Respond to of 77400
AT&T's CEO, Michael Armstrong said FR switches supplied by Cisco AT&T still searching for cause of network problem NEW YORK, April 14 (Reuters) - AT&T Corp. Chairman C. Michael Armstrong said the company has not yet determined what caused its massive frame relay network to fail nationwide but service has been restored to about 96 percent of its customers. Armstrong said the company will not charge its customers for the frame relay service until AT&T identifies the cause of the problem and defines a solution. Armstrong declined to estimate the potential revenue loss from the network outage. The company said it pinpointed the source of the outage as a problem in the interaction between two frame relay switches that affected the rest of the network. The exact cause of the problem has not yet been identified. AT&T's massive frame relay network, a high speed data network, suffered nationwide service interruptions beginning about 1500 EDT/1900 GMT Monday afternoon. Frame relay is a high-speed packet data networking technology used by businesses that need to exchange large amounts of computer information in short and frequent bursts. The problem did not affect AT&T's other networks, for long distance, wireless, and other data services, which continue to operate normally, the company said. AT&T declined to comment on how many customers were affected nationwide, saying only that they numbered in the thousands. Armstrong on Tuesday morning sent letters to AT&T's customers apologizing for the disruption. Armstrong said the company worked directly with several large customers throughout the night to minimize damage and restore service. AT&T said it also worked with its vendors on the problem. AT&T said the switches were supplied by Cisco Systems Inc. . Cisco representatives did not immediately return calls seeking comment. The frame relay business generates about a $1 billion a year for AT&T, representing about two percent of the telecommunications giant's total business, Armstrong said. (( Jessica Hall, New York newsroom 212-859-1729 ))