Region

[Nikunj Shah]

Hi All,

What is audio codec prefrence list in region?

[Jitender Bhandari · Accepted solution]

Hi Nikunj,

Audio Codec Preference list

In Cisco Unified Communications Manager (Unified CM) Administration, use the System > Region Information > Audio Codec Preference menu path to configure the order of audio codec preference, both for calls within a region and for between regions.

Unified CM has two default Audio Codec Preference lists, one for lossy regions and another for low-loss regions. These are the Factory Default lossy, and the Factory Default low loss. Start with a default Audio Codec Preference list to create a custom list.

With the Audio Codec Preference feature, you can:

• Change the relative priorities of audio codecs.
• Save the custom Audio Codec Preference list with a unique name.
• Assign custom codec preference lists for use within a region or between regions.
• Create multiple custom codec preference list.

So basically from 9.x onward you can edit the default list which was not an option in 8.X.

JB

[Chris Deren · Accepted solution]

It's basically a tie breaker between allowed codecs as defined by region matrix or default service parameters. For example G711 and G722 use the same bandwidth and from location perspective both would be allowed, so if for example you prefer G711 over G722 you can adjust the codec preference list to do that. This way if a phone offers both codecs and can be accepted by the other party then G711 would be used over G722.