Refer to the exhibit

When the IP phone 2001 places a call to 90114940302156001, the call is sent to the Cisco Untified Border Element 40302156001 which is what the ITSP expects to receive. The ITSP support personnel claim that they never saw the call, issuing the debug CCSIP message command on the Cisco Unified Border Elmement results in the message “SIP/2 404 Not Found”.

Refer to the Cisco Unified Border Element configuration, debug voice dial and ccsip message exhibits. Which situation can cause this issue?

A.
The Cisco Unified Bolder Element is configured as an MGCP Gateway also so that the call is attempted via the PSTN

B.
The command allow-connections sip to h323 is missing

C.
SIP Error 404 means that a codec mismatch occurred Cisco unified communications manager is sending the call as an early offer witht G.711 codec

D.
The Cisco Unified Communications Manager is misconfigured. The SIP Invite should be sent to the ITSP at 10.1.2.1.2. The debug ccsip message shows the SIP Invite being sent to 10.1.2.1.1