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
--
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda
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