While listening to Rod Speed Pete heard:USR Courier V34 probl

G'day Rod

 PC> Well i use to call a Spirit Thunder with my Courier and get good
 PC> 19200 v.32ter connects most times "this was on quite bad lines"

 RS> That proves nothing at all coz they are both designed to do
 RS> V32terbo. Clearly it must basically work on modems designed to
 RS> do it or it wouldnt have got out into the field at all.

Sounds fair enough.


 PC> and AFAIK other callers with v.32bis modems also connected to
 PC> the Spirit without problem,

 RS> They didnt, Maestros also had problems.

I wasn't aware of that, BTW When i said Spirit i was refering to the
Thunder not the 'II'

 RS> Presumably other rockwell V32bis modems as well.

I have used my old Series 3 E7 conecting with the above mentioned
Thunder without problem, sometimes only at 12k or 9k6 but i've always
put this down to bad qty lines.

 PC> could perhaps the Supra be generating offkey tones

 RS> There is NO 'tone' difference between V32bis and V32terbo, they
 RS> use the SAME carrier freqs and all V32terbo does is have more
 RS> points in the constellation pattern, and thats known to be less
 RS> than very satisfactory on the signal to noise demands it makes
 RS> of the line.

If there is no tone difference how does a ter capable modem tell if
there is the same at the other end.

 PC> and tricking the Courier into thinking the call was a v.32ter
 PC> one.

 RS> The problem with that theory is that you get perfect 14400
 RS> connects EVERY TIME and then after less than a second the
 RS> Courier mindlessly demands a full retrain when V32terbo is
 RS> enabled on the Courier. There is no way that 'tones' from the
 RS> Supra can do that.

I can only comment on my own experience with the Courier, i have v32ter
enabled and what v.32bis connects i've had  hasn't displayed
the symptoms you've discribed above.


   -=Pete=-


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