Vonage is suppose to support the various modem and fax data standards when run
in 90 kbit/s mode and at least for some types of calls is suppose to
automagically switch to this mode.  Personally, I have never been able to NOT
use the 90 kbit/s mode so fax and modem connections have not been a problem for
me.

You can dedicate a specific amount of bandwidth to Vonage by using a second set
of traffic shaper queues but from your description it sounds like the problem is
with the cable ISP.

On Thu, 14 Sep 2006 09:46:56 -0700, you wrote:

>A bit after I switched for DSL to cable (8Mb down, 1.5Mb up--w00t!), I also
>switched my phone service to Vonage.  Good price, but I've been having some
>problems with sound quality.  Half the time when we are talking to someone
>they say that it sounds like we are talking under water, and we've been
>having some trouble transmitting from our Homescan handheld device.  For
>those who don't know (most everyone) AC Nielsen (the same people who do TV
>ratings) have a program called the "Homescan Consumer Panel".  In this they
>send you a handheld bar code scanner, and you scan everything that you buy.
>On the body of the scanner there is an acoustic coupler speaker cup, and to
>transmit you call their 800 number, press the speaker against the phone's
>microphone and press OK.  It than makes a standard modem type connection,
>and transmits all the data that it has collected since it last transmitted.
>We usually don't have a problem with transmitting, but lately we just
>haven't been able to get the data through.  At first I thought it was
>because a Bit-Torrent client was running on our network, but even with all
>the computers turned off, we still can't get it through.  I already have
>traffic shaper going, but I was wondering if it would be possible to
>partition off a specific amount of bandwidth for the Vonage adapter itself?
>I have the call quality set at 90 Kbps and Vonage is heavily preferred
>(weighted at 100 with the highest anything else being at 13).
>
>Any suggestions would be great--I'll send out my config file in the next two
>e-mails (30000 bytes limit).
>
>Thanks--
>
>Richard