There is a enterprise parameter(Advertise G.722 Codec) for this In your case do not use the
enterprise parameter; it will disable the G722 for all phones in your cluster.
If I understand your question correct you want some phones to just use g722 while your other
phones that use g711/g722 to just use g711 .
To accomplish your goal you can do the following...
1-Create one region RG722 with internal codec g722
2-Create one region RG711 with internal codec g711
3-Select the codec between region RG722 and Region RG711 to codec g711
4-Create a device pool dpg722 associate with region g722
5-Create a device poll dpg711 associate with region g711
6-Associate the phone that need to talk g711 with device pool dpg711
7-Associate the phone that need to talk g722 with device pool dpg722
8-Reset the phones
Hope the above information helps!
Thanks,
Karthik
