Dear All,

Really simple setup, no manual conf file changes, just a box running
trixbox with two extensions (Polycom 301s) using NAT (done by
FireBrick) - no connection to the outside world, just internal calls
for now.

All works fine for first call in each session, with the phone
registering as available. However, once a call has been made, the phone
becomes unavailable and all subsiquent calls to that extension getting
shoved to voicemail (busy) and the status reporting as unavailable. It
is like the phone system doesn't know that the call has terminated.
Happens the same if softphones are used (SJPhone on OSX). Call
durations are reporting correctly.

Any ideas? Everything has gone so smoothly (so far).

I would be really greatful for your advice on this one - two of us have
speant all day on it without so much as an inch of progress!

Thanks,

Dan