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From: BRUCE@ccavax.camb.com (Barton F. Bruce)
Newsgroups: comp.dcom.telecom
Subject: Re: AT&T Modem Calls Succeed; Other Carriers Fail
Message-ID: <14240@accuvax.nwu.edu>
Date: 1 Nov 90 21:33:35 GMT
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X-Telecom-Digest: Volume 10, Issue 782, Message 4 of 10


In article <14182@accuvax.nwu.edu>, sba8_ltd@uhura.cc.rochester.edu
(Scott Barnes) writes:

> Over the past few months, I have been unable to place modem calls
> using Least Cost Route (LCR) long distance on our Rolm CBX 9000 PBX.

> Is is possible that one of the LCR carriers has an entire rack of
> faulty equipment (i.e., distorting the frequency of the call)?  Would
> the LCR trunks be distinct from AT&T and local trunks in the Rolm system?  

There are all sorts of possible problems, but you need to ask your
admin. who the other carriers are and HOW they are connected to your
switch.

If there is a leased T1 line to their POP, and if some 'clever' chap
decided that 44 ADPCM voice channels was a better choice than 24 PCM
ones, that IS your problem.