Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request
From: Vance Shipley <vances@xenitec.on.ca>
Newsgroups: comp.dcom.telecom
Subject: Re: Loop Start and Ground Start Trunk Supervision
Message-ID: <6243@accuvax.nwu.edu>
Date: 10 Apr 90 23:41:52 GMT
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Reply-To: vances@xenitec.UUCP (Vance Shipley)
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X-Telecom-Digest: Volume 10, Issue 246, Message 6 of 12


In article <6170@accuvax.nwu.edu>kitty!larry@uunet.uu.net(Larry Lippman) 
writes:

>I have personally never seen a PABX which considers a ground
>start trunk T/R battery reversal as indicative of any type of answer
>supervision, nor have I seen a tariff for this type of offering - by
>New York Telephone, at least.  On the other hand, I don't exactly
>claim intimate familiarity with all the new-fangled PABX's on the
>market these days, so I suppose anything is possible.

The SX series of PBX's from Mitel do recognize answer supervision on
analog trunks.  I believe the SL-1 by Northern Telecom can also.

The reason they do is that answer supervision is tarriffed by Bell
Canada (and others I asume) in one case.  That case is metered local
service in a hotel environment.  You have the option of receiving TM3
trunks from Bell at no charge to you (they determine how many).  These
trunks are for local calling from guest rooms, the hotel is charged 3
cents per COMPLETED call.  The hotel passes the charges (inflated of
course :'>) back to the guest.


Vance Shipley
SwitchView - Linton Technology
(519)746-4460
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