Cisco 8831NR Administration Manual page 132

Cisco Unified IP Phone Does Not Register with Cisco Unified Communications Manager
Cause
If the conference phone does not go through the startup process, the cause may be faulty cables, bad connections,
network outages, lack of power, and so on. Or, the conference phone may not be functional.
Solution
To determine whether the conference phone is functional, follow these suggestions to systematically eliminate
these other potential problems:
• Verify that the network port is functional:
• Verify that the conference phone is receiving power:
• If the conference phone still does not start up properly, perform a factory reset of the conference phone.
If after attempting these solutions, the LCD screen on the conference phone does not display any characters
after at least five minutes, contact a Cisco technical support representative for additional assistance.
Related Topics
Cisco Unified IP Phone Does Not Register with Cisco Unified Communications Manager
To start up properly, the conference phone must be connected to the Ethernet network and registered with a
Cisco Unified Communications Manager. If the conference phone does not start up properly, review the
following sections.
TFTP Server Settings
Problem
The TFTP server settings may not be correct.
Solution
Check the TFTP settings. See
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
122
• Exchange the Ethernet cables with cables that you know are functional.
• Disconnect a functioning conference phone from another port and connect it to this network port
to verify the port is active.
• Connect the conference phone that will not start up to a different network port that is known to be
good.
• Connect the conference phone that will not start up directly to the port on the switch, eliminating
the patch panel connection in the office.
• If you are using external power, verify that the electrical outlet is functional.
• If you are using in-line power, use the external power supply instead.
• If you are using the external power supply, switch with a unit that you know to be functional.
IP Phone Startup Verification, on page 53
Cisco Unified IP Conference Phone Reset or
Conference Phone Power, on page 35
Check TFTP Settings, on page
Troubleshooting and Maintenance
Restore, on page 134
131.