Cisco 7902G - Unified IP Phone VoIP, Administration Manual

Page: 56 / 208

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding Phone Configuration Files and Profile Files
2-6
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones
OL-8151-01
Understanding Phone Configuration Files and Profile
Files
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 new image file.
The phone first requests the configuration file SEP xxxxxxxxxxxx .cnf.xml, where
each xx is the two-digit lowercase hexadecimal representation of each integer in
the phone’s MAC address. If the phone cannot find this file, it requests the
configuration files XMLDefault.cnf.xml and SEDDefault.cnf.
7. Contacting
Cisco Unified
CallManager
The configuration file defines how the
Cisco Unified IP Phone communicates with
Cisco Unified CallManager. After obtaining the
file from the TFTP server, the phone attempts to
make a TCP connection to the highest priority
Cisco Unified CallManager on the list.
If the phone was manually added to the database,
Cisco Unified CallManager identifies the phone.
If the phone was not manually added to the
database and auto-registration is enabled in
Cisco Unified CallManager, the phone attempts to
auto-register itself in the
Cisco Unified CallManager database.
Cisco Unified CallManager informs devices using
.cnf or .cnf.xml format configuration files of their
load ID. Devices using .xml format configuration
files receive the load ID in the configuration file.
•
Understanding the
Phone Startup
Process, page 2-4
•
Resolving Startup
Problems, page 7-2
Table 2-1 Cisco Unified IP Phone Startup Process (continued)
Step Configuration Related Topics