LevelOne VOI-7011 - Manual (Page 67)

61
Codec ID
You can setup the Codec ID in this page. You need to follow
the ITSP suggestion to setup these items.
Note
Two VoIP devices with different Codec ID will
cause the interoperability issue. If you are talking
with others got some problems, you may ask the
other one what kind of Codec ID he use, then you
can change your Codec ID.