[asterisk-users] How to generate 183 Session Progress

[Klaus Darilion]

If the outgoing channel receives progress indication from the far end 
(e.g. ISDN PROGRESS message or 183 response from an ITSP) then Asterisk 
will relay the progress message. If there is no progress indication 
received - that means that early media is not available - Asterisk does 
not send 183 as this would make the client listing for early media 
although it is not available.

regards
klaus

Marc Leurent schrieb:
> Hello everybody,
> I have 2 users connected on the same Asterisk server that are connected with 2 different Asterisk servers.
> 
> For outgoing calls, one in receiving 183 Session Progress and the other not! Do you have any idea why?
> Thanks.
> 
> I have tried to understand by myself and in their INVITE they have almost the same Allow and Supported SIP Headers
> 
> The one that works:
> 	Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
> 	Supported: replaces, timer
> 
> The one that doen't work:
> 	Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
> 	Supported: replaces
>