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Path: utzoo!utgpu!water!watmath!clyde!rutgers!labrea!jade!ucbvax!minnie.UUCP!ihm
From: ihm@minnie.UUCP.UUCP
Newsgroups: comp.dcom.telecom
Subject: (none)
Message-ID: <62243006061@minnie.UUCP>
Date: Wed, 2-Dec-87 10:50:43 EST
Article-I.D.: minnie.62243006061
Posted: Wed Dec  2 10:50:43 1987
Date-Received: Sun, 6-Dec-87 22:02:31 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 43
Approved: telecom@xx.lcs.mit.edu

Newsgroups: comp.dcom.telecom
Subject: Re: no ringing on line
References: <8711140711.AA24080@jade.berkeley.edu>
Reply-To: ihm@minnie.UUCP (Ian Merritt)
Organization: The Frobboz Magic Dungeon Co., Inc.

> From: Doug Mosher
> Subject: no ringing on line
> To: comp-dcom-telecom@ucbvax
> I was calling another business today and got no action; no ringing, no fast or
> slow busy.
>
> I reported this to pac bell via 611 and got this puzzling comment from them:
>
> "Yes, we show this as a problem, probably on their switchboard. We will check
> it and if it's a problem in our lines we will fix it."
>
> Now this surprises me. It seems to mean that under current multi-company
> situations, the intra-lata carrier can encounter some end-user line situations
> which are blocked or dead, and not return any signal (ring, busy, recording,
> intercept) if it's the "fault" of customer equipment. Is this true, or is the
> repair operator jazzing me?

Okaaaay.  First of all, sorry if this doesn't arrive in reasonable
time-- UUCP propagation, you know.

It sounds as if you are describing what's called a DID (Direct Inward
Dialing) installation.  This is an arrangement whereby the Central
Office equipment acts in effect as a tandem, directly signaling the
subscriber's PBX to connect the call to one of its extensions.  The
PBX is responsible for returning call progress tones (i.e. busy, ring,
etc.)  If the Sub's machine is broken or not connected properly to the
incoming line, it could result in the situation you describe.

				--i

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