210-060 · Question #261
What is the limit of Cisco Unified Communications Manager for IP phones located in one standard cluster?
The correct answer is C. 40000. A standard Cisco Unified Communications Manager cluster supports a maximum of 40,000 registered IP phones. This is a published scalability boundary for standard cluster configurations.
Question
What is the limit of Cisco Unified Communications Manager for IP phones located in one standard cluster?
Options
- A30000
- B35000
- C40000
- D45000
How the community answered
(38 responses)- A5% (2)
- B3% (1)
- C89% (34)
- D3% (1)
Why each option
A standard Cisco Unified Communications Manager cluster supports a maximum of 40,000 registered IP phones. This is a published scalability boundary for standard cluster configurations.
30,000 is below the documented maximum and does not reflect the published cluster scalability limit for a standard CUCM deployment.
35,000 is not a recognized official limit in Cisco's published CUCM scalability documentation.
Cisco documentation for CUCM scalability specifies that a standard cluster can support up to 40,000 IP phones. This limit is determined by subscriber node capacity and cluster-wide resource constraints defined in Cisco's preferred architecture guides.
45,000 exceeds the standard cluster limit and is not supported without special high-density or Business Edition configurations.
Concept tested: CUCM standard cluster IP phone scalability limit
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/overview.html
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