-=> Quoting MIKE FARRILL to RICK COLLINS <=-
-=> FidoMail to 1:163/215, please.-=<
mf> I thought that error correction actually increased the modems
mf> speed... 
Nope.  It increases the throughput by using fewer bits (8 rather than
10) to represent a character.  The bits are sent at exactly the same
speed with or without EC.
-> A "perfect" channel, using 8 bytes per char and no packet overhead
-> (which, of course, is not possible) would give 33600/8 = 4200 cps,
-> somewhat less than the 4500 cps claimed.
MF> What would be the max speed for a 28800 connection rate?
28800/8 less overhead.  About 3400 cps or so.
-> Similarly, Zmodem or YModem-g won't change that.
mf> Well, I can tell you, for sure, that YModem-g gives me a
mf> 50-100cps performance edge over Zmodem. 
Sure.  But it _can't_ improve the number of bits the modem can handle
in a second, can it?  It improves throughput by eliminating the
ZModem overhead - at the expense of Zmodem's error detection and
recovery.  If you get a CRC error with YModem the transfer is
terminated.
TTFN. Rick.
Ottawa, ON 9 Apr 17:21 
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