Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watnot!watmath!clyde!cuae2!ihnp4!inuxc!pur-ee!uiucdcs!uxc.cso.uiuc.edu!clio!berger
From: berger@clio.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: High speed frequency-agile modem
Message-ID: <18600009@clio>
Date: Mon, 16-Feb-87 13:54:00 EST
Article-I.D.: clio.18600009
Posted: Mon Feb 16 13:54:00 1987
Date-Received: Wed, 18-Feb-87 22:02:18 EST
References: <2335@sunybcs.UUCP>
Lines: 12
Nf-ID: #R:sunybcs.UUCP:2335:clio:18600009:000:530
Nf-From: clio.Uiuc.ARPA!berger    Feb 16 12:54:00 1987


I think that's a modem that divides the phone line into several
bands, and uses each one as a lower-than-total-throughput-rate
data channel, multiplexing and de-multiplexing the data at each
end.

Problems with these modems include the need to have an identical
modem at the other end for compatibility, unpredictible (and
varying, even over one phone call) baud rate, and substantial
penalties for more than casual use of the reverse channel (in
other words, it's technically full duplex, but at a big
sacrifice in throughput).