Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!casbah.acns.nwu.edu!nucsrl!telecom-request
From: kabra437@pallas.athenanet.com (Ken Abrams)
Newsgroups: comp.dcom.telecom
Subject: Re: Answer Supervision From Loop Start Circuits
Message-ID: <telecom11.129.5@eecs.nwu.edu>
Date: 17 Feb 91 18:41:54 GMT
Sender: news@casbah.acns.nwu.edu
Organization: Athenanet, Inc.,  Springfield, Illinois
Lines: 32
Approved: Telecom@eecs.nwu.edu
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 11, Issue 129, Message 5 of 12
Originator: telecom@delta.eecs.nwu.edu


In article <74365@bu.edu.bu.edu> csense!bote@uunet.uu.net (John
Boteler) writes:

>Although my suggestion may not meet his exact requirements, it does
>work flawlessly for my voice response systems.

>Solution: order CENTREX. That's it! No special tariffs, no unnecessary
>pain (other than the usual CENTREX programming screw-ups), and you get
>features as part of the deal. The answer supervision is provided as an
>OSI (Open Switch Interval) at least on 3*Way calls, and possibly on
>single outbound calls when served by a #1ESS. #5s and their ilk are
>another question.

I hope John doesn't build his business around this "hidden feature"
that he thinks he has found because sometime in the near future it is
likely to disappear.  None of the modern digital switches produce an
open-interval at the point that he is looking for it (can be arranged
for open circuit at disconnect only).  When John's LEC cuts him over
to a digital switch, he will probably complain long and loud because
some of his equipment doesn't work anymore.

If you really need answer supervision, it is available with
ground-start PBX lines in the form of a line reversal.  There may be
other solutions too but trying to interpret an open switching interval
as answer supervision is a big mistake (IMHO); it will likely bite you
in the backside later.


Ken Abrams           uunet!pallas!kabra437
Illinois Bell        kabra437@athenanet.com
Springfield          (voice) 217-753-7965