You have received a trouble ticket stating that users are no longer hearing a second dial tone after pressing 9 to initiate an external call. The trouble ticket states that the second dial tone is played only after several additional digits are dialed. What is the mostly likely cause of this problem?
A. The Cisco Unified CallManager server is experiencing CPU spikes, causing a delay in playing the second dial tone.
B. A route pattern beginning with the digit “9” has been added to the route plan without the Provide Outside Dial Tone check box selected.
C. A route pattern beginning with the digit “9” has been added to the route plan with the Call Classification parameter set to OnNet.
D. The first gateway in the route group is not available, causing a delay in playing the second dial tone while Cisco Unified CallManager queries the second gateway.
