PL> Try adding this to either your init or dial string or whatever
PL> as long as it doesn't get overwritten before dialing: S39=9 S56=2

PC> What does the S39 reg do

PL> Sets the signal level.

SL> What's this about a trial string for the Courier?

PL> It increases the transmit level to -11dB. Works well for another
PL> USR, doesn't do any harm for non-USRs, so it's staying.

SL> I've put the two S-register settings into my init
SL> string and can't really notice any difference. They
SL> haven't screwed things up so I've kept them in my config.

RS> Thats probably not a terrific idea if they dont help. V34 is MEANT
RS> to be able to intelligently adjust the Tx level when appropriate and
RS> its not really a very good idea to disable that if it doesnt help.

TB> From what's been said here about the transmit level registers, it seems
TB> that it only improves the level between two USR's and not other modems.

I'm not convinced we really have adequate evidence to support that proposition.
And its rather unlikely. It really needs to be carefully tested on a line
which has much higher loss on the line to the exchange itself than normal
coz V34 is supposed to be able to set that Tx level intelligently anyway.

Its possible tho, there clearly is a major problem with the USR line
probe stats when the modem on the other end isnt a USR, the entire curve
shifts the best part of 7db and that may well be confusing the USR when
it attempts to set the Tx level to the optimum level. In other words it
gets confused about the line loss in that case and boosts the Tx level
in the auto level setting with a non USR modem at the other end. That
could explain why the effect with USR/USR is different to USR/non USR
on the manual override of the Tx level.

TB> So a V34 connect will automatically adjust itself but
TB> a V34+ connect can be tweaked by us. Simple really.

You havent the evidence to sustain the claim that its only V34+ calls.
@EOT:

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