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Constant RingBack heard with calls over PSTN SIP are XFERed from UC

   I have a CUCM 7.1(3) and Unity Connection 7 deployment with two PSTN connections, 1 SIP and 1 PRI. When calls come in over SIP to an AA, and someone selects an option to XFER to a CUCM Hunt Pilot, the caller on the PSTN hears constant RingBack. The phone(s) in the Hunt Pilot's LG ring normally and all other call processing appears normal. If I call a DID on the PRI which is pointed to the same AA, and XFER to the same Hunt Pilot, Ring back is normal. Normal rining is also heard when I call the AA from the inside and Xfer.

   Also, If I change the UC AutoAttendants XFER to Supervised Transfer, the caller on the PSTN hears one ring back and then silence.

Any ideas? It does seem SIP related.

THANKS!

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Constant RingBack heard with calls over PSTN SIP are XFERed

Found exactly like: http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCth05703 this only happens with blind transferes not supervised as you've already seen.

2 REPLIES
Cisco Employee

Re: Constant RingBack heard with calls over PSTN SIP are XFERed

Found exactly like: http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCth05703 this only happens with blind transferes not supervised as you've already seen.

New Member

Re: Constant RingBack heard with calls over PSTN SIP are XFERed

That was it!!!! Thanks Joe!

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