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- Newsgroups: comp.dcom.fax
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- From: hoepfner@heasfs.gsfc.nasa.gov (Patrick Hoepfner)
- Subject: Re: Q for Fax/Modem card
- Message-ID: <hoepfner-231192164819@hoepfner.gsfc.nasa.gov>
- Followup-To: comp.dcom.fax
- Sender: usenet@nsisrv.gsfc.nasa.gov (Usenet)
- Nntp-Posting-Host: hoepfner.gsfc.nasa.gov
- Organization: NASA/Goddard Space Flight Center
- References: <1992Nov23.115759.1@brt.deakin.edu.au> <4H8ouB1w165w@halcyon.com>
- Date: Mon, 23 Nov 1992 21:54:48 GMT
- Lines: 17
-
- In article <4H8ouB1w165w@halcyon.com>, puma@halcyon.com (puma) wrote:
- >
- > guac@brt.deakin.edu.au writes:
- > > I bought a Fax/Modem package recently. It says 9600 bpd for Fax and
- > > 2400 bps for modem. But the fax and modem share one card, why they
- > > have different speed ?
-
- > The modem and fax portions of the card are served by different
- > circuitry. They may both be on one chip even, but the functions
- > are separately defined.
-
- In addition, the fax standard is half duplex. Only one machine can talk at
- a time. With data modems at 9600 bps data can be sent and received at the
- same time. This means that 9600 bps data is twice as difficult to do as
- 9600 bps fax.
-
- -- Pat ------------------------------------> hoepfner@heasfs.gsfc.nasa.gov
-