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- <text id=91TT1569>
- <title>
- July 15, 1991: Business Notes:Communications
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1991
- July 15, 1991 Misleading Labels
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- BUSINESS, Page 51
- Business Notes
- COMMUNICATIONS
- Disconnected, Part 2
- </hdr><body>
- <p> In a country with the world's most renowned phone system,
- plain old breakdowns aren't supposed to happen. But lately America
- has been coming unhooked. The most recent epidemic began on June
- 26, when 6.3 million customers in Washington, Maryland, Virginia
- and West Virginia lost service for up to eight hours. The same
- day, phone circuits went haywire in two Southern California area
- codes. Then, last week, 1 million Bell of Pennsylvania customers
- temporarily lost service, as did dialers in San Francisco. The
- scourge of breakdowns was eerily reminiscent of the January 1990
- collapse of AT&T's long-distance system.
- </p>
- <p> Most of the outages were quickly corrected, but repairing
- confidence may take a while longer. After discounting sabotage
- or a computer virus, investigators focused on the common thread
- shared by the stricken areas--they all use a computerized
- super-operator dubbed Signaling System 7, which automatically
- chooses the most efficient route for each call.
- </p>
- <p> At week's end the maker of the SS7 network, DSC
- Communications, declared that flaws in its own software had
- triggered the plague of busy signals and dial tones. The
- Texas-based company said it would make alterations in the
- affected phone systems that should act "like a fuse on a power
- line" and prevent small glitches from escalating into major
- breakdowns.
- </p>
-
- </body></article>
- </text>
-
-