Cisco IP Phone 6851

DescriptionParameter
Preferred codec for all calls. The actual codec used in a call still depends
on the outcome of the codec negotiation protocol.
Select one of the following:
•
G711u
•
G711a
•
G729a
•
G729ab
•
G722
•
G722.2
•
iLBC
•
OPUS
•
iSAC
Default: G711u
Preferred Codec
Select No to use any code. Select Yes to use only the preferred codes.
When you select Yes, calls fail if the far end does not support the
preferred codecs.
Default: No
Use Pref Codec Only
Codec to use if the first codec fails.
Default: Unspecified
Second Preferred Codec
Codec to use if the second codec fails.
Default: Unspecified
Third Preferred Codec
Enables use of the G.711u codec.
Default: Yes
G711u Enable
Enables use of the G.711a codec.
Default: Yes
G711a Enable
To enable use of the G.729a codec at 8 kbps, select Yes. Otherwise,
select No.
Default: Yes
G729a Enable
Enables use of the G.722 codec.
Default: Yes
G722 Enable
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
203
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