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From: logajan@ns.network.com (John Logajan)
Newsgroups: comp.dcom.fax
Subject: Re: Why FAX send-only?
Message-ID: <1991Jan30.040809.13692@ns.network.com>
Date: 30 Jan 91 04:08:09 GMT
Sender: news@ns.network.com
Organization: Network Systems Corporation
Lines: 19
Nntp-Posting-Host: ns

oeschi@netmbx.UUCP (Johann Deutinger) writes:
>The reason to have many modems with fax send-only is that there are some
>quite cheap modem chips (mainly from Sierra) that implement sending
>faxes at 4800 bps (V27ter) only. Receiving faxes at high speed is
>much more difficult than sending them. This makes the price difference.

Thanks to the many people who have confirmed this.  The latest issue of
Byte magazine also discusses the different aspects of FAX and concurs
that the send-only FAXes do indeed get by by using available cheaper
parts for the send circuit, for which no comparable cheap components
exist for the receive circuit.

The upshot of all of this is that you can't (in my opinion) buy a send-only
FAX in the hope that some software upgrade in the future will make it
a send/receive FAX.  It would require a hardware replacement.

-- 
- John Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428
- logajan@ns.network.com, 612-424-4888, Fax 612-424-2853