Hello,

On 5/30/11 1:14 PM, Iñaki Baz Castillo wrote:

Hi, just wondering whether the following scenario (which it's not possible in kamailio 1.5) is possible in 3.X:

1. Alice calls a PSTN number.

2. Proxy receives the call and routes it to a media server which plays

an early-announcement (30 seconds long).

3. After N seconds (maybe 10 seconds) proxy starts a new parallel

branch to the PSTN gateway *without* cancelling the previous branch with the media server.

4. Let's suppose the PSTN phone rings and proxy gets 183 with SDP

(ringing in real audio). Proxy converts such 183 into a 180 with no SDP (already possible in Kamailio).

5. After 30 seconds media server rejects the call with 480. PSTN

branch remains ringing as usual.

I just would like to know if Kamailio 3.X allows point 3. I think it's hard but maybe I miss some feature.

the best you have to code it in C, should not be that hard: - keep the transaction ID in some list - after a while, based on a timer process, lookup transaction - add a branch and forward it

Or, if possible, fake somehow a negative reply and inject it from the network, then kamailio will trigger a failure route, the media server will still play.

Or put another proxy before media server, use rtimer+mqueue to cancel a transaction after a while with: http://kamailio.org/docs/modules/stable/modules_k/tmx.html#id2784882

Inside intermediary proxy, drop the cancels. It might work at the end :-)

Cheers, Daniel