An engineer has added new SIP phones to the Cisco Unified Communications Manager and now can no longer get an outside dial tone when pressing the steering digit 9 for calling local or long distance numbers. Which action must the engineer take to resolve this issue?
A. Verify that the new phones added in Cisco Unified CM do not start with an extension of 9.
B. Configure the outside dial tone of the new SIP phone.
C. Check the dial plan to ensure that any new route patterns added in Cisco Unified CM do not start with 9
D. Ensure the gateway long distance and local dial peers are being triggered on outbound calls.
Both A & C could be correct, The fact dialling 9 for outside line has stopped working since adding the new SIP phones, the most likely answer would be A. However that is covered in answer C.