Configure The Voice Codecs; Audio Codec Parameters - Cisco 8800 Series Manual

Cisco IP Phone Configuration
Parameter
Microphone
Gain

Configure the Voice Codecs

A codec resource is considered allocated if it has been included in the SDP codec list of an active call, even
though it eventually might not be chosen for the connection. Negotiation of the optimal voice codec sometimes
depends on the ability of the Cisco IP Phone to match a codec name with the far-end device or gateway codec
name. The phone allows the network administrator to individually name the various codecs that are supported
such that the correct codec successfully negotiates with the far-end equipment.
The Cisco IP Phone supports voice codec priority. You can select up to three preferred codecs. The administrator
can select the low-bit-rate codec that is used for each line. G.711a and G.711u are always enabled.
You can also configure the parameters in the phone configuration file with XML(cfg.xml) code. To configure
each parameter, see the syntax of the string in
Before you begin
Access the phone administration web page. See
Procedure
Step 1
Select Voice > Ext(n), where n is an extension number.
Step 2 In the Audio Configuration section, configure the parameters as defined in the
page 277
Step 3 Click Submit All Changes.

Audio Codec Parameters

The following table defines the function and usage of the voice codec parameters in the Audio Configuration
section under the Voice > Ext (n) tab in the phone web interface. It also defines the syntax of the string that
is added in the phone configuration file (cfg.xml) with XML code to configure a parameter.
Description
Sets the microphone gain for the handset and the connected headsets.
Perform one of the following:
• In the phone configuration file with XML(cfg.xml), enter a string in this format:
<Microphone_Gain ua="rw">Default</Microphone_Gain>
• In the phone web interface, select an appropriate value.
Options: Softest|Softer|Soft|Default|Loud|Louder|Loudest
Default: Default
Note You can't adjust the microphone gain of the phone speaker and the headset that
uses the USB port.
table.
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
Audio Codec Parameters, on page
Access the Phone Web Interface, on page
Configure the Voice Codecs
277.
104.
Audio Codec Parameters, on
277