[Asterisk-Users] Problem with 827-4v and asterisk as a pstn GW

[Simone Ricci]

Hi,
I've a problem with a cisco 827-4v and asterisk (1.0.9) acting as
sip-to-pstn GW. The issue is that when a call comes in from the pstn,
asterisk correctly contacts the router, which in turns send a "183
Session progress". Obviously, asterisk thinks that the telephone is not
ringing (because it expects a "180 Ringing") and we have no ringback on
the pstn side. Putting a ringing() in the dialplan is not an option.

Anyone has suggestions?

Cheers,
Simone.