1

RFC-3261 doesn't talk much about TimerC and when it fires. I understand the importance of TimerC in forking scenarios.

Does TimerC have any role in regular SIP call?

Vladimir Ralev
  • 1,371
  • 9
  • 18
TheLearner
  • 439
  • 1
  • 7
  • 10

1 Answers1

0

Correct. Only Proxies use Timer C. Timer C is the proxy INVITE transaction timeout. It is used to check if a proxied INVITE request never generates a final response. The Timer C MUST be set for each client transaction when an INVITE request is proxied ie each URI you forward the SIP INVITE to after receiving the initial INVITE.

jeand
  • 2,325
  • 14
  • 12