Cisco 7821 Administration Guide

DescriptionParameter
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
Enables use of the G.722.2 codec.
Default: No
G722.2 Enable
Enables use of the iLBC codec.
Default: Yes
iLBC Enable
Enables the use of OPUS codec.
Default: Yes
OPUS Enable
To enable silence suppression so that silent audio
frames are not transmitted, select Yes. Otherwise,
select No.
Default: No
Silence Supp Enable
The method for transmitting DTMF signals to the far
end. The options are:
• AVT—Audio video transport. Sends DTMF as
AVT events.
• InBand—Sends DTMF by using the audio path.
• Auto—Uses InBand or AVT based on the
outcome of codec negotiation.
• INFO—Uses the SIP INFO method.
DTMF Tx Method
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
292
Cisco IP Phone Troubleshooting
Audio Configuration

Cisco 7821 Specifications

General

Brand	Cisco
Model	7821
Category	IP Phone
Language	English