350-801 · Question #424
An engineer configures a new phone in Cisco UCM. The phone boots and gets an IP address when it connects to the network, however the phone fails to register with Cisco UCM. The engineer observes…
The correct answer is A. whether auto-registration is enabled in Cisco UCM. A 'Rejected' status in Cisco UCM almost always means the phone attempted to register but UCM has no record of that device (no pre-configured device entry) AND auto-registration is disabled. Auto-registration allows unknown phones to register using a generic device pool and…
Question
An engineer configures a new phone in Cisco UCM. The phone boots and gets an IP address when it connects to the network, however the phone fails to register with Cisco UCM. The engineer observes that the phone has a status Rejected in Cisco UCM. What must be verified first thing troubleshooting the issue?
Options
- Awhether auto-registration is enabled in Cisco UCM
- Bwhether the Initial Trust List and Certificate Trust List files on the phone are correct
- Cwhether the phone is in the correct VLAN
- Dwhether the phone's MAC address is correct In Cisco UCM
How the community answered
(32 responses)- A94% (30)
- C3% (1)
- D3% (1)
Explanation
A 'Rejected' status in Cisco UCM almost always means the phone attempted to register but UCM has no record of that device (no pre-configured device entry) AND auto-registration is disabled. Auto-registration allows unknown phones to register using a generic device pool and configuration. Verifying whether auto-registration is enabled is the correct first troubleshooting step because it directly explains the 'Rejected' state. If auto-registration is disabled and the phone is not manually added by its MAC address, UCM will reject it. The other options - VLAN assignment, ITL/CTL files, and MAC address correctness - are valid troubleshooting steps but come after confirming basic registration policy.
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