An engineer must configure a new Cisco UCM route pattern. When a user at extension 5555 and external phone number mask XXXX dials 911 or 9911, these requirements must be met: - Both patterns must be…

The route pattern 9.11 matches any four-digit number starting with 9 and ending with 11, including the dialed number 9911. When combined with a Called Party Transform Mask of 911, it ensures that 9911 (and other 9X11 numbers that match this pattern) are transformed and sent to the gateway as 911, while the Calling Party Transform Mask sets the caller ID to 5555555555.

While Route pattern: 9911 would precisely match the 9911 dial string, the combination of A and D is specified as correct, implying a broader matching pattern 9.11 is considered for 9911 in this context.

The route pattern 911 - would match 911 and any longer numbers starting with 911, but it would not match 9911, thus failing to meet the requirement to accept both 911 and 9911.

The route pattern 911 precisely matches the dialed number 911. With a Called Party Transform Mask of 911, the number 911 is sent directly to the gateway, and the Calling Party Transform Mask of 5555555555 correctly sets the desired caller ID for emergency calls.

The route pattern 9.911 - would match five-digit numbers like 90911 through 99911 and strip off digits after the 9.911 part, which is incorrect for matching either 911 or 9911.