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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!andrew.cmu.edu!jhm+
From: jhm+@andrew.cmu.edu (Jim Morris)
Newsgroups: comp.sys.mac,alt.fax
Subject: Multiplexing FAX & voice
Message-ID: <0ZQIlkm00UhBM0wn5n@andrew.cmu.edu>
Date: 27 Nov 89 15:02:08 GMT
Organization: Information Technology Center, Carnegie Mellon, Pittsburgh, PA
Lines: 17

A while ago we had a long discussion here about using a single phone
line for incoming FAXes and phone calls from people. The conclusion
seemed to be

1. Outside the U.S. the sending FAX announces itself first, so a device
that detects the signal was feasible.

2. U.S. FAX machines expect the receiver to announce its intentions, so
the best solution is a FAX machine that starts off as a phone answering
machine, asks the caller for a message, and switches to FAX mode if it
doesn't detect voice.


However, a friend just told me about a $125 device he uses that detects
the "sender's FAX carrier" after the first ring and switches between FAX
and voice mode without hassle. Does this mean that 1. is not true; or is
he just lucky in his correspondents?