On Aug 08 20:26, 1997, John Weemhoff of 1:105/314 wrote:
JW> Hi Rick!   Thanks for the testing tips!  I guess if the data
JW> compression is working, the large text file upload should upload quiker
JW> with the v42.bis data compression enabled at 28.8 or 33.6 right?
JW> Comparing it to a data compression disabled upload time of the same
JW> file should give me a pretty good idea what the rates are and if the
JW> data compression is working. 
Correct. Uncompressed, the effective throughput can be no better than your 
connect speed (ignoring error correction, which improves the throughput).  
When compressed by the modem, though, the throughput is determined by the 
actual connect speed of the modem multiplied by the compression factor 
obtained.  Less any overhead, of course.  How much compression you get will 
depend on the nature of the file itself and how "compressible" it is.
There are "standard" file suites available that can be used for testing, but 
they're really only useful for comparing one modem implementation against 
another - more work than you're likely willing to take. :-)
Rick
--- MsgedSQ 3.30
---------------