Just because you can get a connect with them doesn't mean that you have
full compatibility. Remember some of V.90 came from X2.
As for the other modems, usually I find its not the speed that is actually
making connections appear slow but a severe number of retrains and/or
renegotiations. This makes the connection jerky and/or sporadic and
overall connection speed is abysmal. Some of the things to try. Take
everything but the customer's modem off the phone line. No Fax machines,
other modems, answering machines, handsets, caller ID boxes, etc. Try
disabling V.42 error control, then V.42 compression. Then if that doesn't
work, turn off all error control and compression. Of course, also try on
a known good line. And all this is assuming you are using the latest
stable code on both ends. (For the Acers, you can try locking the speed
to something lower than 50K like 48000 or 45333. And turn off X2, but
this will probably make your 50K connects go away)
If its a winmodem, you can also try reducing the amount of processing the
CPU needs to do, such as reducing the number of screen colors and
resolution, and other programs running etc.
On Wed, 8 Jul 1998, John Gonzalez/netMDC admin wrote:
>i have exactly the same problem with acer model 56pvs-T (x2 modems) with
>the pm3. What's funny, is that the modems say they do not, without
>upgrades support v.90 and in fact, they Do. We get connections of around
>50k in V90 mode with them. However, the data send/receive is very slow,
>exactly like what you described. We are also running b16 i believe. I
>posted a similar question as you a couple weeks ago and never got a
>response. We are running over a channelized T1 however.
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