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Alter a new SIP trunk is configured from a third-party SIP trunk provider, the call does not seem to work. A troubles hooting tool and a tiace log from the Cisco Unified Border Element shows that there is communication with the provider and that it is sending out SDP information in the 2XX response. Why is the call not working?
A.
The Cisco Unified Border Element does not have any PDVM resources to terminate the SIP trunk assigned.
B.
The SIP provider expects a delayed offer.
C.
The SIP provider expects an early offer.
D.
The Cisco Unified Border Element must be licensed for third-party SIP trunks.
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