210-060 · Question #124
An engineer is configuring a group of DNs and wants the external phone number mask to match the last four digits of the DN. Which option should be used?
The correct answer is B. 123555XXXX. In CUCM, uppercase X characters in the external phone number mask act as wildcards that are replaced by the corresponding digits of the actual Directory Number.
Question
An engineer is configuring a group of DNs and wants the external phone number mask to match the last four digits of the DN. Which option should be used?
Options
- A123555xxxx
- B123555XXXX
- C123555****
- D123555....
How the community answered
(48 responses)- A8% (4)
- B85% (41)
- C4% (2)
- D2% (1)
Why each option
In CUCM, uppercase X characters in the external phone number mask act as wildcards that are replaced by the corresponding digits of the actual Directory Number.
Lowercase x is not a recognized wildcard in the CUCM external phone number mask field and will be treated as a literal character, producing an incorrect mask.
CUCM uses uppercase X as the wildcard character in the external phone number mask, where each X is substituted with the corresponding digit from the right side of the DN. The mask 123555XXXX replaces the four X positions with the last four digits of the DN, producing the correct 10-digit external number.
Asterisks (*) are not valid wildcard characters for the external phone number mask in CUCM and will not substitute DN digits.
Dots (.) are not valid wildcard characters for the external phone number mask in CUCM and would not represent DN digits.
Concept tested: CUCM external phone number mask wildcard syntax
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_010100.html
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