350-801 CLCOR: Implementing and Operating Cisco Collaboration Core TechnologiesDemo

By Cisco · Question Mode

QuestionQ79

On-Premises Call Control

An engineer configures a new phone in Cisco UCM. The phone boots and obtains an IP address after connecting to the network, but it does not register with Cisco UCM. The engineer sees a Rejected status for the phone in Cisco UCM. What should be verified first when troubleshooting this issue?

  • A whether auto-registration is enabled in Cisco UCM
  • B whether the phone is in the correct VLAN
  • C whether the Initial Trust List and Certificate Trust List files on the phone are correct
  • D whether the phone’s MAC address is correct in Cisco UCM
Explanation

A rejected registration means the phone can reach Cisco UCM but Cisco UCM does not accept its registration as the configured device. The configured phone MAC address must exactly match the physical phone’s MAC address so Cisco UCM can identify and authorize that endpoint. Cisco documentation for registration-rejected phones directs administrators to confirm that the phone is in the Cisco Unified Communications Manager database by searching for its MAC address.

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