You are performing route pattern configuration. You need to ensure that internal extensions are automatically expanded to full external phone numbers for calling line information on outgoing calls. Wh

The correct answer is D. external phone number mask of the calling party. The 'External Phone Number Mask' configured on a directory number (line) in CUCM is used to transform the internal extension into a full, dialable external phone number for presentation as the Calling Line ID (CLID) on outgoing PSTN calls. For example, an internal extension of 12

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Question

You are performing route pattern configuration. You need to ensure that internal extensions are automatically expanded to full external phone numbers for calling line information on outgoing calls. What should you use?

Options

Acalling extension expansion
Bcalled number expansion
Cexternal number mask of the called party
Dexternal phone number mask of the calling party

How the community answered

(35 responses)

A
3% (1)
C
3% (1)
D
94% (33)

Explanation

The 'External Phone Number Mask' configured on a directory number (line) in CUCM is used to transform the internal extension into a full, dialable external phone number for presentation as the Calling Line ID (CLID) on outgoing PSTN calls. For example, an internal extension of 1234 could be masked to 1-800-555-1234. This is a calling party transformation - it affects how the caller's number appears to the called party. 'External number mask of the called party' (option C) would modify the called number, which is the opposite of what is needed here.

Topics

#external phone number mask#calling party#calling line information#number expansion

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