[Ekiga-list] Perhaps a race? Some numbers work, others not

[ael <law_ence dev ntlworld com>]

Running ekiga on linux some numbers just silently disconnect while
others work. Calling the same numbers from my Grandstream ATA always
works.

This is using sound only: no video.

A simple example is calling the sipgate test number 10000 sipgate co uk 
That *always* works. In contrast calling 50000 sipgate co uk (their
voicemail number) usually disconnects silently.

However if I set -d 4 for debug, 50000 sipgate co uk almost always
works. Which is why I suspect a race. 

I have managed after many attempts to capture a debug trace of
50000 sipgate co uk failing. I also captured a 10000 sipgate co uk
debug trace working. A simple diff of the two cases wasn't useful (for
me: far too much noise, and the traces differed almost every where).

The two gzipped traces are 41K and 48K long so quite compact. 
Any help with debugging these?

ael