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echo: aust_modem
to: Russell Brooks
from: Dave Hatch
date: 1996-07-28 13:23:44
subject: problems

BG>>> US/Canada EPROM code, with their higher than legal -10db TX levels
BG>>> (and the fact that they also suffer from the Sportster's V.42bis
BG>>> problem tells me that the code is identical).

AT>> Higher as in -11 or as in -9?? I've seen a few reposts of connection 
AT>> stats with -15db TX levels..

RB> The modems negotiate and many factors combine, resulting in the
RB> decided Xmit level.

RB> With some modems the capability is in place to allow YOU to decide on
RB> the xmit level, and lock the modem to that. Though YOUR choice
RB> (usually people think...the higher the better (the lower the number,
RB> the higher the strength) does not always have the best outcome.

RB> It is best to let the modems come up with the best solution them
RB> selves

It might well be - if the algorithms weren't deliberately damaged at Austel
mandate specified by the local manufacturer.  My analysis tends to a
constant about 6 to 8 db too low, _unless_ the link is local, when it may
leave it too high.  Nasty work - and IMNSHO, not an accident in the
slightest.

Note that if the S/N isn't enough to maintain top speed, turning the tx
level down is NOT a winner.  The nobbled USR code almost always does.

Regards,
Dave Hatch.

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