Xref: utzoo comp.periphs:3129 alt.fax:965
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From: ropg@ooc.uva.nl (Rop Gonggrijp)
Newsgroups: comp.periphs,alt.fax
Subject: Re: Information about "Caller ID"
Message-ID: <13202@slice.ooc.uva.nl>
Date: 16 Sep 90 16:41:25 GMT
References: <BENNY.90Sep14132659@dimona.vlss.amdahl.com>
Followup-To: comp.periphs
Organization: uvabick
Lines: 10


I know that there are different protocols agreed upon by different phone
companies. The American network uses a 300 baud data FSK modulated burst
between the first and second ring (or so I am told)

The Dutch system does not have Caller ID but internal phone company docs
are said to say that it will be a DTMF (touch-Tone) string BEFORE the first
ring. I wish I had more specifics......

Rop Gonggrijp (ropg@ooc.uva.nl)