You have designed a complex dial plan using digit manipulation. Given the following snippet of your configuration file, what action would you expect to result when a call beginning with the digits “5501” is received?
dial-peer voice 1 pots destination-pattern 5501… …
prefix port 1/0/0 PrometricVUE.com

A.
A nine digit number beginning with 5501 will be forwarded.

B.
A ten digit number beginning with 5501 will be forwarded.

C.
A nine digit number beginning with 5501612 will be forwarded.

D.
A ten digit number beginning with 5501612 will be forwarded.

Explanation:

Destination Pattern The destination pattern associates a dialed string with a specific telephony device. It is configured in a dial peer by using the destination-pattern command. If the dialed string matches the destination pattern, the call is routed according to the voice port in POTS dial peers, or the session target in voice-network dial peers. For outbound voice-network dial peers, the destination pattern may also determine the dialed digits that the router collects and then forwards to the remote telephony interface, such as a PBX, a telephone, or the PSTN. You must configure a destination pattern for each POTS and voice-network dial peer that you define on the router.
The destination pattern can be either a complete telephone number or a partial telephone number with wildcard digits, represented by a period (.) character. Each “.” represents a wildcard for an individual digit that the originating router expects to match.For example, if the destination pattern for a dial peer is defined as “555….”, then any dialed string beginning with 555, plus at least four additional digits, matches this dial peer.