i need some advice on how to solve a problem.
I've a scenario like following:
[SIP PBX] <---->CUCM (Call Manager v 10.5 )
User A: belong to CUCM
User B: belong to SIP PBX
User C: belong to SIP PBX
User A calls User B. After some conversation, User A wants to transfer call to User C.
CUCM transfer the call with re-INVITE; in this case on SIP PBX 2 channel SIP are used.
CUCM does not support transfer, on Trunk, using REFER method.
My idea is using OpenSIPS beetwen SIP-PBX and CUCM and handles call generating REFER msg in some way.
Is this idea a good one?
Or there is a better way?