Cisco 8800 Series Manual page 298

Audio Codec Parameters
Table 57: Audio Codec Parameters
Parameter
Preferred Codec
Use Pref Codec
Only
Second Preferred
Codec
Third Preferred
Codec
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
278
Description
Preferred codec for all calls. The actual codec used in a call still depends on the outcome
of the codec negotiation protocol.
Perform one of the following:
• In the phone configuration file with XML(cfg.xml), enter a string in this format:
<Preferred_Codec_1_ ua="rw">G711u</Preferred_Codec_1_>
• In the phone web interface, select your preferred codec from the list.
Allowed values: G711u|G711a|G729a|G722|G722.2|iLBC|iSAC|OPUS
Default: G711u
Select No to use any code. Select Yes to use only the preferred codes. When you select
Yes, calls fail if the far end does not support the preferred codecs.
Perform one of the following:
• In the phone configuration file with XML(cfg.xml), enter a string in this format:
<Use_Pref_Codec_Only_1_ ua="rw">No</Use_Pref_Codec_Only_1_>
• In the phone web interface, set this field to Yes or No as needed.
Allowed values: Yes|No
Default: No
Codec to use if the codec specified in Preferred Codec fails.
Perform one of the following:
• In the phone configuration file with XML(cfg.xml), enter a string in this format:
<Second_Preferred_Codec_1_
ua="rw">Unspecified</Second_Preferred_Codec_1_>
• In the phone web interface, select your preferred codec from the list.
Allowed values: Unspecified|G711u|G711a|G729a|G722|G722.2|iLBC|iSAC|OPUS
Default: Unspecified
Codec to use if the codecs specified in Preferred Codec and Second Preferred Codec
fail.
Perform one of the following:
• In the phone configuration file with XML(cfg.xml), enter a string in this format:
<Third_Preferred_Codec_1_
ua="rw">Unspecified</Third_Preferred_Codec_1_>
• In the phone web interface, select your preferred codec from the list.
Allowed values: Unspecified|G711u|G711a|G729a|G722|G722.2|iLBC|iSAC|OPUS
Default: Unspecified
Cisco IP Phone Configuration