Communications Manager; Identifying Error Messages - Cisco CP-3911 - Unified SIP Phone 3911 VoIP Administration Manual

Chapter 7 Troubleshooting and Maintenance
Symptom: The Cisco Unified IP Phone Does Not Register with
Cisco Unified Communications Manager

Identifying Error Messages

Cisco Unified SIP Phone 3911 Administration Guide for Cisco Unified Communications Manager
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If the phone proceeds past the first stage of the startup process (LED buttons
flashing on and off) but displays error messages on the LCD screen, the phone is
not starting up properly. The phone cannot successfully start up unless it is
connected to the Ethernet network and it has registered with a Cisco Unified
Communications Manager server.
These sections can assist you in determining the reason the phone is unable to start
up properly:
Identifying Error Messages, page 7-3
•
Registering the Phone with Cisco Unified Communications Manager,
•
page 7-4
Checking Network Connectivity, page 7-4
•
Verifying TFTP Server Settings, page 7-4
•
Verifying IP Addressing and Routing, page 7-5
•
• Verifying DNS Settings, page 7-5
Verifying Cisco Unified Communications Manager Settings, page 7-5
•
Cisco Unified Communications Manager and TFTP Services Are Not
•
Running, page 7-6
Creating a New Configuration File, page 7-6
•
In addition, problems with security may prevent the phone from starting up
properly. See the "General Troubleshooting Tips for the Cisco Unified IP Phone"
section on page 7-12 for more information.
As the Cisco Unified SIP Phone 3911 cycles through the startup process, you can
access status messages that might provide you with information about the cause
of a problem.
Resolving Startup Problems
7-3