Show Mobile Navigation

Wednesday, March 16, 2016

, , , ,

Parallel Forking and Sequential Forking in SIP

Leke Oyetoke - Wednesday, March 16, 2016

What is Parallel Forking in SIP?

In this situation, the proxy server will fork the INVITE to, say, two devices (UA2, UA3) at a time. Both the devices will produce 180 Ringing and whoever receives the call will generate a 200 OK. The response (suppose UA2) that reaches the Originator first will establish a session with UA2. For the other response, a CANCEL will be triggered. If the originator receives both the responses at the same time, then based on q-value; it will forward and send the response.

What is Sequential Forking in SIP?

In this situation, the proxy server will fork the INVITE to one device (UA2). If UA2 is unavailable or busy at that time, then the proxy will fork it to another device (UA3).


0 comments:

Post a Comment