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From: minsky@parc.xerox.com (Henry Minsky)
Newsgroups: comp.dcom.fax
Subject: Re: simple connection between fax and fax modem
Message-ID: <1991Jun26.214944.5668@parc.xerox.com>
Date: 26 Jun 91 21:49:44 GMT
References: <1991Jun26.160352.6005@milton.u.washington.edu>
Sender: news@parc.xerox.com
Organization: Xerox PARC
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In article <1991Jun26.160352.6005@milton.u.washington.edu> joseph@milton.u.washington.edu (Joseph Chan) writes:
>From: joseph@milton.u.washington.edu (Joseph Chan)
>I have a standalone fax machine and a fax modem (send/receive at 9600
>baud) installed on my 286 machine.  There is no RS232 port on the fax 
>machine.   I have one phone line at home.   Here is what I am trying 
>to accomplish (i.e. use the fax machine as a scaner):
>1. Connect the fax machine to the fax modem thru a regular modular
>cord.
>2. Send image from the fax machine to the fax modem over the telephone
>cable. (since I have one phone line at home, I can not send the fax
>image over the telephone system)

I have a Murata fax machine, and an Abaton Interfax modem (with class
2 firmware). I found that I could send faxes from the Murata to my modem
without using two phone lines by the following setup:

The Murata has an RJ11 jack for the phone line from the wall, and an
RJ11 jack for its own telephone handset. I did the reverse of what
they said to do in the instructions: I plugged the telephone line cord
into the "phone" jack, and then wired the faxmodem and the handset to
the "line" jack, through a splitter. This enabled me to convince the
fax machine to start sending (it needs a dial tone to convince it to
begin the t30 handshake). When the faxmodem answers, the internal
circuits automatically cut out the "phone" jack, i.e., in my case the
phone line, and leave the fax machine talking to the modem.

Btw, there is a tar file of a copy of the draft Class 2 modem spec
which someone faxed in as a bunch of 1-d huffman g3 format files,
available from anonymous FTP from

tr.ai.mit.edu in /pub/class2man.tar