Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!asuvax!hrc!godzilla!dalyb
From: dalyb@godzilla.UUCP (Brian Daly)
Newsgroups: sci.electronics
Subject: Re: Detecting telephone call progress tones
Summary: Reference on Telephony
Keywords: telephone detect tone
Message-ID: <47d20b6f.1423f@godzilla.UUCP>
Date: 3 Jan 90 21:38:28 GMT
References: <33315@ucbvax.BERKELEY.EDU>
Organization: gte
Lines: 10


A good general reference for telecommunications is:

    Telecommunication Transmission Handbook

     Author: Roger L. Freeman
     Publisher: John Wiley and Sons

Brian K. Daly
AG Communication Systems, Phoenix, Arizona