I am designing a solution that requires a system to take over the calls of another host. Let's say I have a SIP call in progress between A and B. Host B is shut down and a new Host (C ) takes its place, with the same IP address as B. And assuming SIP is running over UDP in this case. If I have all information about the original call between A and B, is it possible for C to replace B and resume/answer the call already in progress? (since no invite/answer, just send parameters to PJSIP and tell it to resume a call in progress?) Thx