Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!vector!nobody
From: "Joseph_J._Gerber.henr801E"@Xerox.COM
Newsgroups: comp.dcom.telecom
Subject: Some testing done on switched 56kbs
Message-ID: 
Date: 5 Dec 88 15:58:58 GMT
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X-TELECOM-Digest: volume 8, issue 195, message 8

BRIAN:

I AM NO EXPERT ON SWITCHED 56KBS BUT MY GROUP TESTED IT IN 1987 FROM
ROCHESTER N.Y. TO CHICAGO AND SANTA  ANA, CALIF.

BASICALLY YOU NEED A DEDICATED 56KBS FROM YOUR SITE TO THE  CLOSEST CO
WHICH SUUPORTS SWITCHED 56KBS. THE SERVICE IS DIGITAL 56KBS A T1 IS NOT
REQUIRED.

FACILITY IS READILY AVAILABLE EXCEPT WHEN AT&T HAS MAJOR OUTAGE ALONG THE
NETWORK.  FOR EXAMPLE WE LOST ALL CKTS GOING WEST BECAUSE SOMEBODY DUG UP
FIBER CABLE ALONG RIGHT AWAY OR AT&T LOSES REPEATER STATION ALONG ROUTE.
THEN ALL TRAFFIC GOES ON PRIORTIY  ROUTING W/ HOSPITALS, MILITARY, POLICE
AND AT&T GETTING CAPACITY BEFORE US PAYING CUSTOMERS. AS A BACKUP CHANNEL
WE OPTED FOR SATELLITE.

IF YOU NEED EXCESS CAPACITY FROM TIME TO TIME I THINK IT'S FINE. IF YOU ARE
LOKKING FOR CONTINGENCY CAPACITY DURING MAJOR CIRCUIT OUTAGES, FIND A
DIFFERENT FACILITY AT&T RUN SWITCHED 56KBS ALONG SIDE EVERYTING ELSE,
PROBABLY A MUXED T3.