RE: Valid Baud Rate Values

["Patrick Ouellette" <pouellet@eng.utoledo.edu>]

Hello Patrick,

The speeds listed in the ppp.options file are the speeds the
port is opened with, and therefore the speed the local computer
speaks to the modem with.  

Most modern modems have some compression hardware / software 
built in which allows your data transfer rate to be greater
than the 'raw' communication rate between modems.  The amount
of compression is dependent on the type of data you are 
transferring.

I recall reading in a modem manual once a recommendation that 
the computer to modem speed be set two to three times the
modem to modem speed to ensure that the modem was not starved
for data when compression is enabled.  For a 28.8 modem this
implies a setting of 57600 or greater.  My experience has 
been 115200 is a reasonable speed to use for a 28.8 or a 33.6 
modem with compression.  I haven't tried any of the 56K modems
(and given the other options that are becoming available
I probably won't).

I usually am not limited so much by my modem's speed as by my
ISP and / or the remote site.

Hope this helps,

Pat



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