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From: vances@xenitec.on.ca (Vance Shipley)
Newsgroups: comp.dcom.telecom
Subject: Re: Answer Supervision on PBX
Message-ID: <13886@accuvax.nwu.edu>
Date: 21 Oct 90 20:31:27 GMT
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X-Telecom-Digest: Volume 10, Issue 752, Message 7 of 10


In article <13844@accuvax.nwu.edu> dave@mars.njit.edu (Dave Michaels) 
writes:

>We have an AT&T Definity something orother PBX here on campus.  I
>recently discovered that the CO does not send answer supervision info
>to the PBX. As a result, we pay for calls that ring for more than 30
>seconds if they are answered or not.  Any PBX's not have this problem?
>Why won't (cant?) NJ Bell provide that information to the PBX?  Also,

Answer supervision can be had, probably even by your PBX.  But someone
would have to engineer it.  This shouldn't be too hard; digital trunks
configured as TIE lines should do it.  Most telco's have in the past
been reluctant to provide answer supervision for some reason but today
it should'nt be too dificult at all if you're willing to do whatever
is required AKA installing T1 if you don't already have it.

US West recently announced they would provide answer supervision on
analog lines as well.  I'm not sure how many PBX's can support this
but i know that northern telecom's SL-1/M-1 can as well as mitel's sx
line.

>is there any way around the fact that since the school is a 'business'
>with a 'business line' the residents of the residence halls who are on
>the system must pay for local calls?

The residents may not be businesses but the telcom administration is.
They are running a business of aggregating the use of those resident
phones over a service provided to the school.  The school however
doesn't have to charge the residents for local calls :)

>Do all schools with PBX's have these problems?

>[Moderator's Note: Not all schools have that problem. Just the ones
>which buy cheap equipment thinking they will save money.   PAT]

I'm sure AT&T's switches can do most of the things an sl-1 can :)