The Locally Sourced Announcement and Music feature is based on the concept of audio source groups. Using this feature, you can locate announcement and music sources on any or all the virtual VALs (v VAL) in a gateway. The v VAL circuit packs are assigned to an audio group. The audio group is then assigned to an announcement or audio extension as a group sourced location. When an incoming call requires an announcement or music-on-hold, the audio source that is closest to the incoming call trunk plays the file that is assigned to the announcement extension.

For more information, see the feature description on Locally Sourced Announcements and Music.