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echo: aust_modem
to: Malcolm Wan
from: Peter Collis
date: 1996-03-04 22:15:36
subject: SMARTLINK V32TERBO

While listening to Malcolm Wan Pete heard:SMARTLINK V32TERBO

G'day Malcolm

 MW> Now here's my init string pretty basic as you will see...

 MW> AT &F E1 &K3 %C1 \N3 L0 M3
~~~               ^^^
change this to %C2 and see what happens

 MW> Now comes the funny bit.

 MW> When it connects to another 14400, I am able to DL and UL at around 
 MW> 1630+cps But..! *WHEN* it connects to a NETCOMM M34F 28.8, I can only
 MW> DL and UL at a sickly *1350* or slightly lower CPS rate...SHIT!!! Why's
 MW> that? 

%C1 is MNP5 compression which when DLing already compressed files
slows things up quite a bit because it tries to recompress already
compressed files, using %C2 tells the modem to use V42bis compression
which is smarter and steps aside if the file can't be compressed any
more. The reason the Netcomm is slower would be that it has been
configured to allow both MNP5 & V42bis compression, the others are
more than likely configured for no compression or V42bis only, as your
requesting MNP5 compression via the %C1 command the Netcomm is only
giving you what you ask for. If your modem doesn't support %C2 then
just turn off compression with %C0


   -=Pete=-


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