210-060 Question #57: Real Exam Question with Answer & Explanation

Question

Options

• ACisco Unified Communications Manager is unable to reach user IP phone.
• BCisco Unified Communications Manager database replication status is 2.
• CCisco Unified Communications Manager auto registration is disabled.
• DCisco Unified Communications Manager is unable to allocate DN.
• ECisco Unified Communications Manager subscriber is offline.

Explanation

When Cisco Unified Communications Manager cannot allocate a Directory Number to a registering IP phone - typically because the auto-registration DN pool is exhausted - it sends back an explicit rejection that the phone displays as 'Registration Rejected'.

Common mistakes.

• A. If CUCM cannot reach the phone, the phone would display a timeout or 'Configuring IP' message, not a rejection from CUCM.
• B. Database replication status 2 indicates successful replication and is a healthy state that does not cause phone registration to be rejected.
• C. Disabling auto-registration prevents unknown devices from being automatically provisioned, but a pre-configured phone would still register; the behavior and message differ from a DN allocation failure.
• E. A subscriber node being offline would cause phones to fail over to another node or display a connection error, not a 'Registration Rejected' message.

Concept tested. CUCM IP phone registration and DN allocation failure

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/adminGuide/cucm_b_administration-guide-1251/cucm_b_administration-guide-1251_chapter_0100.html

No community discussion yet for this question.