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echo: hs_modems
to: RICK COLLINS
from: MIKE FARRILL
date: 1997-04-11 16:44:00
subject: 4400cps on a 33600/3

-> -=> 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.
If people want more speed, Why don't they just reduce the bits to 7 or
6?
-> MF> What would be the max speed for a 28800 connection rate?
-> 28800/8 less overhead.  About 3400 cps or so.
3400, I've seen close to that at a friend's house.
-> 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.
Oh well, I could just use ZMODEM RESUME after the transfer stops.
--- Platinum Xpress/386/Wildcat! v1.3
---------------
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