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TIME: Almanac 1990s
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Time_Almanac_1990s_SoftKey_1994.iso
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1994-03-25
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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>