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From: paul@morganucodon.cis.ohio-state.edu (Paul Placeway)
Newsgroups: comp.dcom.modems
Subject: Re: Which is best? (USR vs Telebit)
Keywords: Telebit elegance
Message-ID: <25339@tut.cis.ohio-state.edu>
Date: 21 Oct 88 14:56:10 GMT
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I have another problem with asymmetrical frequency division.  For file
transfer, 9600 one way and 300 the other is fine, unless you are
running something like SLIP and doing simultaneous FTP in both
directions.  In that case, both channels will have a full load, and
AFD will just fall apart and give between 2400 and 4800 bps throughput
(depending on how smart the modem is).

It seems to me that the Telebit protocol will suffer less from this.
Besides, the Telebit protocol seems to still have room to grow.
Assuming an optimal line, giving 512 channels through it, at 30 baud
per channel, 2 bits per baud, that gives an effective total bandwidth
of 30720 bps.  Assuming that they can squeeze more bits/baud or more
baud/channel, speeds can go up from there.  Besides, it's more
resistant to limited bandwidth connections; just don't use the
channels you don't have.

Of course, I'm not authoritative, just giving my $.02...

			-- Paul