Chapter6 Customizing the Cisco Unified IP Phone
Configuring Wideband Headset Codec
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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
OL-11524-01
Note Cisco recommends that you also store backup copies of custom image
files in another location. You can use these backup copies if the
customized files are overwritten when you upgrade
Cisco Unified CallManager.
Step3 Use a text editor to edit the List.xml file. See the “List.xml File Format
Requirements” section on page 6-5 for the location of this file, formatting
requirements, and a sample file.
Step4 Save your modifications and close the List.xml file.
Note When you upgrade Cisco Unified CallManager, a default List.xml file
will replace your customized List.xml file. After your customize the
List.xml file, make a copy of the file and store it in another location. After
upgrading CiscoUnified CallManager, replace the default List.xml file
with your stored copy.
Step5 To cache the new List.xml file, stop and start the TFTP service by using
Cisco Unified CallManager Serviceability or disable and re-enable the Enable
Caching of Constant and Bin Files at Startup TFTP service parameter (located in
the Advanced Service Parameters).
Configuring Wideband Headset CodecUsers can configure a setting called Wideband Headset in the Audio Preferences
menu on the phone (choose > User Preferences > Audio Preferences>
Wideband Headset). This setting is Disabled by default, and should be enabled
only if the user’s headset supports wideband.
If Cisco Unified CallManager has been configured to use G.722 (G.722 is enabled
by default for Cisco Unified IP Phone Models 7941G, 7941G-GE, 7961G,
7961G-GE, 7970G, and 7971G-GE; other phone models may not support it), and
the far endpoint also supports G.722, the call will be connected using the G.722
codec in place of G.711. This occurs regardless of whether the user has enabled a
wideband headset, but if the headset is enabled, the headset user may notice