210-060 · Question #390
Which directory number setting defines calling permissions?
The correct answer is C. calling search space. In Cisco Unified Communications Manager, the Calling Search Space assigned to a directory number determines which route partitions - and therefore which destinations - that line is permitted to reach.
Question
Which directory number setting defines calling permissions?
Options
- Aroute partition
- Bexternal phone mask
- Ccalling search space
- Dassociated devices
How the community answered
(30 responses)- B3% (1)
- C90% (27)
- D7% (2)
Why each option
In Cisco Unified Communications Manager, the Calling Search Space assigned to a directory number determines which route partitions - and therefore which destinations - that line is permitted to reach.
A route partition is a logical grouping assigned to directory numbers and route patterns to restrict who can call them, but it does not itself define the caller's outbound dialing permissions.
The external phone mask is a digit string that overrides the caller ID presented to the PSTN and has no effect on which destinations a phone is permitted to dial.
A Calling Search Space is an ordered list of route partitions that defines which destinations a directory number or device is allowed to dial. When a call is placed, CUCM checks whether the dialed number's partition is included in the CSS of the calling line, enforcing calling permissions. Without the appropriate CSS, calls to certain partitions are blocked regardless of network reachability.
Associated devices links a directory number to physical or soft phones, relating to device registration rather than calling permission control.
Concept tested: Calling Search Space defining directory number calling permissions
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_0100.html
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