Cause
If the phone does not go through the startup process, the cause may be faulty cables, bad connections, network
outages, lack of power, or the phone may not be functional.
Solution
To determine whether the phone is functional, use the following suggestions to eliminate other potential
problems.
•
Verify that the network port is functional:
◦
Exchange the Ethernet cables with cables that you know are functional.
◦
Disconnect a functioning Cisco Unified IP Phone from another port and connect it to this network
port to verify that the port is active.
◦
Connect the Cisco Unified IP Phone that does not start up to a different network port that is known
to be good.
◦
Connect the Cisco Unified IP Phone that does not start up directly to the port on the switch,
eliminating the patch panel connection in the office.
•
Verify that the phone is receiving power:
◦
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.
•
If the phone still does not start up properly, power up the phone with the handset off-hook. When the
phone is powered up in this way, it attempts to launch a backup software image.
•
If the phone still does not start up properly, perform a factory reset of the phone. For instructions, see
Basic Reset, on page 290
.
•
After you attempt these solutions, if the phone screen on the Cisco Unified IP Phone does not display
any characters after at least five minutes, contact a Cisco technical support representative for additional
assistance.
Cisco Unified IP Phone Does Not Register with Cisco Unified Communications Manager
If the phone proceeds past the first stage of the startup process (LED buttons flashing on and off) but continues
to cycle through the messages that displays on the phone screen, the phone is not starting up properly. The
phone cannot successfully start up unless it connects to the Ethernet network and it registers with a Cisco
Unified Communications Manager server.
In addition, problems with security may prevent the phone from starting up properly. See
Troubleshooting Information, on page 289
for more information.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
10.0 (SIP)
268
Troubleshooting and Maintenance
Startup Problems
REVIEW DRAFT - CISCO CONFIDENTIAL
