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From: faunt@cisco.com (Doug Faunt N6TQS 415-688-8269)
Newsgroups: comp.dcom.telecom
Subject: Re: Help with Rotored Lines/ Rack Mounted Modems
Message-ID: <9796@accuvax.nwu.edu>
Date: 15 Jul 90 13:51:39 GMT
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X-Telecom-Digest: Volume 10, Issue 489, Message 9 of 10


It turns out, that the way to busy-out a bad modem in a T2500
rack-mount system is to pull the modem out of the rack, and send it in
to get it fixed, presumably.  This can be done on a running card cage
with no problems.  If you could get someone to flip a switch, you
could get them to pull a card.

Another solution is to check out various styles of "call
distribution".  We have a ATT Systme 75 here at cisco, and one of the
styles of call distribution is called "uniform call distribution".  It
tries to route the next call to a group to the least-used line
available, but never the same line as the last call, so if there's a
bad modem, the user just hangs up and redials, and gets a different
line.  Bad modems are indicated pretty reliably by various statistics
that our, cisco, terminal servers keep.  I don't know if "UCD" is
available from central offices, however.  good luck, faunt@cisco.com