Hello,
How I can bridge two calls in SIP by sending A party an indication to change SDP to B party and start playing the B party annoucement to A so A party will be hearing the ringing of B or annoucement of B.
A Party SIP/GW B Party
1|---------INVITE---------->| |
|<----------100------------| |
| |------------IAM---------->|2
| |<=========Audio===========|
| | |3
4|<------183 with SDP-------| |
|<=========Audio===========| |
5| | |
6| | |
7| | |
| |------------REL---------->|8
| |<-----------RLC-----------|9
10|-----------ACK----------->| |
Is it possible to change the SDP and make the call communication between A and B directly in preanswer mode?