[Asterisk-Users] 180 Ringing? (BUG?)

[Michael Manousos]

Mirko Marghitola wrote:
> Asterisk don't send the "180 Ringing" SIP message to the calling phone 
> when the called party is ringing. How can I force asterisk to send the 
> ringing messages? The option 'r' in the Dial() command or the Ringing() 
> command didn't solve the problem.
> Mirko
> 

Did the sip channel driver sent a progress when the called phone started
ringing? In this case the driver does not send the ringing.

Anyway, I don't think this behavior is correct because it breaks other
protocols. E.g. if two Asterisks use SIP for their interconnection and
talk H.323 with foreign gateways, then the H.323 conversation produced
by the conversion H.323 <-> SIP <-> H.323 is wrong because the
ALERTING of the first H.323 leg won't be generated on the second leg.
And according to the H.323 recommendation ALERTING is a mandatory
message.

Michael.