-=> Quoting Dan Bridges to All <=-
-=> FidoMail to 1:163/215, please.-=<
DB> If you mostly send/receive pre-compressed files you may think
DB> there is little need to set the DTE much higher than the DCE. But
DB> a high-speed modems DCE link (meaning DCE-DCE) operates
DB> synchronously whereas the DTE link (meaning DTE-DCE)operates
DB> asynchronously. At 31,200bps DCE, the DTE transfer rate after
sync->async conversion is 39,000bps  (DCE * 10bits/char /
DB> 8bits/char).
That's not the whole story, and is a little misleading.  While the
data on the DCE is sent without start and stop bits, _some_ of that
data is header information used by the EC protocol itself, and isn't
passed on to the DTE link.  A 31,200 DCE connect will result in about
36,000 bps on the DTE.
db> Here are actual results. On a V.34+ connection between USR
db> V.Everything Couriers. DCE 31,200 bps. Couldn't get more than
db> about 2,665 cps (85% efficiency) (using Zmodem) transferring a
db> 560K zipfile if the DTE is set to 38,400 bps. Once I returned
db> the DTE to 57,600bps then the transfer rate returned to
db> 3570-3600cps (114%-115%). 
You will note that 3600 cps on the DTE is 36,000 bps.
I won't dispute your findings, but I'd suggest the reason is not
simply the DTE speed being overwhelmed by the data rate.
TTFN. Rick.
Ottawa, ON 16 May 19:13 
--- Blue Wave/DOS v2.20
---------------