AT&T will change backup-power plan as a result of pressure from customers

Article Abstract:

AT&T has notified the Federal Communications Commission (FCC) that it will change its procedures and will no longer respond to overloads on utility circuits by transferring to its own generators. AT&T has decided to do this because a network failure that occurred on Sep 17, 1991, happened when AT&T shifted to its own power. Because the shift was made to short-life batteries instead of to the proper generators, a network failure was consequent. An AT&T spokesman says that customers have complained, saying the company's traditional procedures represent an unacceptable risk. Reports by the FCC and by the New York Public Service Commission are critical of AT&T's network management, but they differ over whether 'power-shedding arrangements' were a significant factor in the recent failure.

Prevention, Telephone systems, System failures (Engineering), Telephone System, Back-Up Systems

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Mistake causes another AT&T outage, cutting off most service in New England

Article Abstract:

AT&T experienced yet another failure in its phone networks on Tuesday, Nov 5, 1991. The four-hour shutdown at a transmission facility serving most of New England is AT&T's fourth major network failure since Jan 1990. According to AT&T, technicians who were installing hardware missed a step in their procedures causing the consequent problems. The particular piece of equipment that failed is called a Digital Access Cross-Connect System, or 'DACCS.' It is described as a refrigerator-sized 'electronic traffic cop.' The Federal Communications Commission (FCC) is investigating the incident.

Long distance telephone services, Long-distance telephone service

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