[Asterisk-Users] Problem with a new italian service provider...

[Massimo De Nadal]

I've a problem connecting uniVoice (http://voice.uni.it)  from asterisk.
Using my account data I can place a call smoothly using xlite or my 
budgetone phone directly, but I'm not able to use uniVoice as a peer 
from asterisk.
Registration seems to work correctly, but when I try do dial, the sip 
authentication fails every time.
Their tech people told me that they are unable to make asterisk working 
properly due to some asterisk authentication features lacks.
The problem persists using chan_sip2 too.

So, the question is:
how can I help investigating the problem to obtain some good bugs report 
for digium ??

maxx