I have Unity Connection 8.5.1ES65 cluster with CUCM 8.5 cluster with a SIP integration. My (only) CallHandler will not transfer calls (via Caller Input) to DNs unless Call Action> Transfer Type is "Supervise Transfer". I am calling from an inside DN. During "Supervise Transfer" the destination phone does ring, but I don't hear ring-back; perhaps because we have MoH disabled (I can have played: "please wait while we transfer your call"). If I setthe Call Action> to "Release to Switch", I never hear ring back, only dead air, and the destination number does NOT ring. Likewsie, if a setup a Caller Input> User with Mailbox > Attempt Transfer, the phone does not ring, but if I send it to the greeting, I do receive the greeting. I've setup a Directory Handler and it appears to show similar characteristics: I can locate a name, but the DH never transfers me to the phone.
Yes, the call does connect on Supervised Transfer. I can make it work/break it repeatidly, by selecting between Supervised Transfer and Release to Switch. It is the same codec- the destination phone never rings when RtS is selected, and the caller hears dead-air. (The caller hears dead-air on Supervised Transfer, but I think I can explain that to something unrelated.)
IntroductionCUCM Routing RulesDial String implementation PolicyCUCM Routing LogicSIP URI Call Routing Analysis+++ Case Study: 1 ++++++ Case Study: 2 +++Conclusion
Over the last few months, I have had the privilege of working on SI...
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