What is required for Cisco UCM to accept SIP calls with a URI in the format of 'sip:2001@cucmpub.cisco.com'?
Define Cluster Fully Qualified Domain Name under Servers in Cisco UCM.
Change the Destination Address to a Fully Qualified Domain Name on the SIP trunk.
Define Cluster Fully Qualified Domain Name in Enterprise Parameters.
Set the SIPS URI Handling to True in CallManager Service Parameters.
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