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Cisco Bug: CSCui95415 - Enhancement to make CUCM send REFER message to transfer calls

Last Modified

Nov 27, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

9.1(2.10000.2)

Description (partial)

Symptom:
CUCM at this point does not use the REFER method in SIP to transfer a call. It uses INVITE and UPDATE messages. This causes extra SIP communication legs in complex transfer scenarios which wouldn't be needed if REFER were used like in Meeting Place or CME.

Conditions:
Transfer scenario from one SIP party to another SIP party.  May or may not necessarily be an inter-cluster call.
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