Understanding Phone Configuration Files - Cisco 3951 Administration Manual

Understanding Phone Configuration Files

Understanding Phone Configuration Files
Cisco Unified SIP Phone 3951 Administration Guide for Cisco Unified CallManager 5.1
2-6
Chapter 2
Table 2-2 Related Documentation for Power
Document Topics
Integrated Service
Routers
Cisco IOS Software
Configuration files for a phone are stored on the TFTP server and define
parameters for connecting to Cisco Unified CallManager. In general, any time
you make a change in Cisco Unified CallManager that requires the phone to be
reset, a change is made to the phone's configuration file automatically.
Configuration files also contain information about which image load the phone
should be running. If this image load differs from the one currently loaded on a
phone, the phone contacts the TFTP server to request the required load files.
The phone first attempts to access the SEP<MAC>.cnf.xml file. If this file does
not exist, then it will look for the SIP<MAC>.cnf file and the default
configuration file named SIPDefault.cnf
from the TFTP server when the following conditions exist:
You have enabled auto-registration in Cisco Unified CallManager
•
The phone has not been added to the Cisco Unified CallManager Database
•
The phone is registering for the first time
•
If auto registration is not enabled and the phone has not been added to the
Cisco Unified CallManager Database, the phone registration request will be
rejected. In this case, the phone will reset and attempt to register repeatedly.
If the phone has registered before, the phone will access the configuration file
named SIPmac_address.cnf, where mac_address is the MAC address of the
phone.
For more information on how a SIP phone interacts with the TFTP server, refer to
the Cisco Unified CallManager System Guide.
Preparing to Install the Cisco Unified IP Phone on Your Network
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