Rod, at 09:37 on Feb 22 1996, you wrote to Bill Grimsley...

BG> Did my Sportster demand a retrain when you called it the other day ?

RS> Nope, only Couriers do, and only when the V32terbo is
RS> enabled. Which does sort of hint at some quirk in the USR
RS> V32terbo code since the Sportster doesnt support that mode.

BG> Could it also be something to do with the fact that
BG> USR have proprietarily extended V.32ter to 21600,

RS> Yes, thats certainly quite possible. I couldnt see any
RS> obvious way to disable JUST the 21600 speed and not the
RS> 19200 V32terbo, but then I didnt look that hard I must admit.

There doesn't appear to be any way of restricting the Courier to just 19200
V.32terbo.  It's either all or nothing, it would seem.

BG> and it may be attempting to train upwards
BG> following the initial 19200 connect ?

RS> No, its always gets a perfect 14400 connect every time and its
RS> appears to be attempting a retrain to see if 19200 is feasible.
RS> Corse its quite possible that if the Courier could be told to
RS> not attempt 21600 V32terbo, that that might work fine. If its
RS> possible to actually tell a Courier to do that.

If you have the on-line manual (I believe you do), check the explicit
warning WRT the Courier changing its port speed if a V.32terbo caller
connects.  Looks like USR use this in conjunction with their proprietary
ASL, which conceivably could cause problems with some modems.  That said,
however, it still doesn't explain why YOURS is the only modem reported to
suffer from these problems.

RS> We tried disabling both of those, S34.2=1 and S34.128=1, tried
RS> individually. Didnt actually try both at once come to think of it.

Setting S34.128=1 would merely disable V.32terbo completely.

RS> It bit quite a few existing modems back in the days when USR
RS> first started pushing it with V32bis. And since it causes the
RS> Supra no problems with a Sportster, it cant be that alone.

Not surprising, as the Sportster doesn't support V.32terbo connects.

BG> To date, you're the only person who has reported this "problem".

RS> Trouble with that line of argument is that I've heard it all
RS> before Bill. Thats what everyone said with the Spirit double
RS> send, and it turned out that heaps of people were actually seeing
RS> it and many didnt even realise that there was a problem at all.

That simply manifested itself as halved cps rates though.  Your Supra
problem is far more obvious, as it doesn't even connect properly, and I've
not yet seen any other V.32bis users report similar happenings.

BG> I wonder if you've bothered trying any other modems at all.
BG> The results would be extremely interesting, to say the least...

RS> Its a bit hard. Most dont even show that they are seeing a retrain
RS> demand from the other end, and its not a trivial matter to get someone
RS> who isnt doesnt know a bit about modems to try it and report back either.

Didn't you originally state that the vast majority of calls from your Supra
to the Courier were failing completely though ?  If so, it would be very
easy to check by simple substitution with another brand of V.32bis modem.

Regards, Bill

--- Msgedsq/2 3.20