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Date:      Sat, 15 Jun 1996 00:08:11 -0700 (MST)
From:      Don Yuniskis <dgy@rtd.com>
To:        gpalmer@FreeBSD.ORG (Gary Palmer)
Cc:        freebsd-multimedia@FreeBSD.ORG
Subject:   Re: CallerID ?
Message-ID:  <199606150708.AAA16942@seagull.rtd.com>
In-Reply-To: <13584.834820464@palmer.demon.co.uk> from "Gary Palmer" at Jun 15, 96 07:34:24 am

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> May I ask what you used to interrogate the CallerID string out of the
> modem? There is only one teleco in the UK (well, losely speaking)
> which provides the actual copper which goes into your house, so it
> should (in theory) be possible for me to do the same with my USR? Or
> does USR not work with the CallerID stuff?

It depends on the modem.  The CallerID signal is a pulse train
impressed on the line between rings.  Your modem needs to have 
the hardware hooks to see this (many modems are isolated from
the line with a mechanical relay until they go off hook and
the only thing that's always on line is the ring detector).

--don



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