On Mon, 2005-05-16 at 22:21 +0100, Chris Bagnall wrote:

> FWIW, if you're only likely to be running one voice call and your service
> provider supports GSM, you should be able to get away with only dedicating
> about 35kbps to that pipe, which means the hit won't be quite so serious.

Don't forget the TCP overhead for GSM, which in my tests require about
45k. I figured this by looking at the realtime traffic graph on the
m0n0wall interface. FWIW, a single ulaw call required ~85k

-lee