-> mf> Is the EC overhead you are refering to come from the use of the
-> mf> Zmodem protocol? Y-modem-g is always faster. And also, he
-> mf> could be using the 512k lap-m packet size which would give more
-> mf> performance.
->
-> The EC overhead I was referring to was that imposed by LAPM or MNP 4.
-> The size of the packet doesn't matter - no matter how big it is it
-> will contain extra data for the purposes of managing the packet.
-> Naturally, the larger the packet, the smaller the _percentage_ of
-> each packet that is "non data", but you will not _exceed_ the maximum
-> rate of the channel even if you reduce the overhead to zero.
I thought that error correction actually increased the modems speed...
-> 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.
What would be the max speed for a 28800 connection rate?
-> Similarly, Zmodem or YModem-g won't change that.
Well, I can tell you, for sure, that YModem-g gives me a 50-100cps
performance edge over Zmodem.
--- Platinum Xpress/386/Wildcat! v1.3
---------------