Alex, at 19:06 on Dec 02 1996, you wrote to Bill Grimsley...

AM> What's the highest speed you have EVER got on any of your 
AM> 28.8 or 33.6 modems?

4008cps whilst transferring a 1.6Mb maximally compressed file between two
V.E Couriers with a 33k6 connect, and using 256-byte LAPM with SREJ active.
 

AM> A couple of nights ago, I got 4290 cps, upload on a 28.8K connection.

Something is wrong, as that overall speed is just not physically possible.

AM> The file was compressed with PKZIP, using maximum compression (-EX) and the 
AM> file was about 1.6MB big. Zmodem protocol, V.42 and V.42bis, etc.

The file is certainly large enough to allow for accurate logging of
transfer rates, so all I can suggest is that the file may somehow have
still been subject to further compression with BTLZ.  Can't see how though.

AM> I thought maybe my comms program was buggering up, but when the upload 
AM> finished from their end it reported 4290 cps average. What do you think? 

Maybe both ends buggered up somehow?  Or perhaps the file had already been
partially sent, and Zmodem has simply appended the balance of the file to
the original with its crash-recovery feature.  That'd certainly indicate
inflated cps rates, depending upon how much of the file had already been
sent.

AM> This modem is a Netcomm Roadster V34, and the highest CPS rate I ever got 
AM> before was 3390 cps in the same situation as above.

Which is precisely what you should be expecting...

Regards, Bill

--- MsgedSQ/2 3.50