Configuring Wideband Codec - Cisco CP-7961G Administration Manual

Configuring Wideband Codec

Step 4 Use a text editor to edit the List.xml file. See
location of this file, formatting requirements, and a sample file.
Step 5 Save your modifications and close the List.xml file.
Note
To cache the new List.xml file, stop and start the TFTP service by using Cisco Unified Communications
Step 6
Manager 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 Codec
If Cisco Unified Communications Manager has been configured to use G.722 (G.722 is enabled by
default for the Cisco Unified IP Phone 7962G and 7942G) and if the far endpoint supports G.722, the
call can connect using the G.722 codec in place of G.711. This situation occurs regardless of whether
the user has enabled a wideband headset or wideband handset, but if either the headset or handset is
enabled, the user may notice greater audio sensitivity during the call. Greater sensitivity means improved
audio clarity but also means that more background noise can be heard by the far endpoint—noise such
as rustling papers or nearby conversations. Even without a wideband headset or handset, some users may
prefer the additional sensitivity of G.722. Other users may be distracted by the additional sensitivity of
G.722.
Two parameters in Cisco Unified Communications Manager Administration affect whether wideband is
supported for this Cisco Unified Communications Manager server and/or a specific phone:
Advertise G.722 Codec—From Cisco Unified Communications Manager Administration, choose
System > Enterprise Parameters. The default value of this enterprise parameter is True, which means
that all Cisco Unified IP Phone models that are described in this administration guide and are registered
to this Cisco Unified Communications Manager will advertise G.722 to Cisco Unified Communications
Manager. For more information, see the Cisco Unified Communications Manager System Guide, Cisco
Unified IP Phones chapter, Codec Usage section.
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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
6-6
When you upgrade Cisco Unified Communications Manager, a default List.xml file will replace
your customized List.xml file. After you customize the List.xml file, make a copy of the file and
store it in another location. After upgrading Cisco Unified Communications Manager, replace
the default List.xml file with your stored copy.
Advertise G.722 Codec—From Cisco Unified Communications Manager Administration, choose
Device > Phone. The default value of this product-specific parameter is to use the value specified
in the enterprise parameter. If you want to override this on a per-phone basis, choose Enabled or
Disabled in the Advertise G.722 Codec parameter on the Product Specific Configuration area of the
Phone Configuration window.
Chapter 6
List.xml File Format Requirements, page 6-4
Customizing the Cisco Unified IP Phone
for the
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