Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usenet!ogicse!littlei!portland!drewsxpa
From: drewsxpa@portland.intel.com (Paul Drews)
Newsgroups: comp.dcom.fax
Subject: Re: Protocols available?
Message-ID: <drewsxpa.665955501@portland>
Date: 7 Feb 91 19:38:21 GMT
References: <1991Feb4.185201.1070@magnus.ircc.ohio-state.edu>
Sender: root@littlei.UUCP
Distribution: usa
Lines: 26

In <1991Feb4.185201.1070@magnus.ircc.ohio-state.edu> mtrotter@hpuxa.ircc.ohio-state.edu (Mark L. Trotter) writes:

>Hello net world!!
>In trying to understand (and perhaps write some programs) concerning FAX
>files and protocols, I am looking for the specs dealing with all of the
>conversations between two FAXs.  I have already downloaded the CCITT T.4
>Draft Recommendation for group 3 data.  However, this does not include
>the pre and post communications.  Does anyone know where this information
>is available???

In the February Byte magazine, page 301-308, there's an article called
"Fax  Facts"  that gives a pretty good overview of how fax works.  The
full specification is available as one of the CCITT "Red Books":

Volume  VII,  Fascicle  VII.3,  Terminal  Equipment  and Protocols for
Telematic   Services,   The   International  Telegraph  and  Telephone
Consultative  Committee (CCITT), Geneva, 1985.  You can write to ANSI,
Attention:   Sales,  1430  Broadway,  New York, N.Y., 10018.  Sorry, I
don't  have a phone number.  I vaguely recall seeing a price list with
$60 for this book, but don't take my word for it.

Be  warned,  the  fax protocols involve both digital and analog signal
exchanges,  timing rules, etc.  It generally takes special hardware to
make a fax machine.

				- PauL Drews