cmedxCodecNegotiationPreference
1.3.6.1.4.1.9.10.104.1.1.6.1.2
This object specified the preference configured by the
user for each CODEC. Lower the number, higher the
preference of the CODEC.
If this object is set to 0, the corresponding CODEC will
not be used in coded negotiation procedure.
Initially, if the value of cmedxCodecNegotiationCodec is
g711u, this object is set to 1, else this object is set to 0.
For CODECs having the same preference, the entry with the
lower index has higher precedence.