Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!uunet!motcid!wallach
From: wallach@motcid.UUCP (Cliff H. Wallach)
Newsgroups: comp.dcom.fax
Subject: Re: Why FAX send-only?
Message-ID: <4520@avocado5.UUCP>
Date: 28 Jan 91 23:09:41 GMT
References: <1991Jan27.195313.25909@ns.network.com>
Organization: Motorola Inc. - Cellular Infrastructure Div., Arlington Heights, IL 60004
Lines: 18

In article <1991Jan27.195313.25909@ns.network.com> logajan@ns.network.com (John Logajan) writes:
-
-Forgive me if this has been discussed before, but what is the reason
-behind these computer FAX modems / software that are advertized as
-send-only.  What is the technical difficulty in producing send/receive?
-
-The more technical your answer, the better. :-)
-
-Thanks.


It is much easier to build a transmit only fax modem.  Modulating the
the signal can be done with an 8-bit controller, while a DSP chip is
needed to demodulate.  I believe that Sierra sells a V22.bis + sendfax
chipset.


Cliff Wallach				...uunet!motcid!wallach