Audio Configuration - Cisco ATA 191 Administration Manual

Supplementary Service Subscription

Audio Configuration

Table 56: Audio Configuration Settings
Field
Preferred Codec
Second Preferred Codec
Third Preferred Codec
Use Pref Codec Only
Codec Negotiation
G729a Enable
Silence Supp Enable
G726-32 Enable
Cisco ATA 191 and ATA 192 Analog Telephone Adapter Administration Guide for Multiplatform Firmware
84
Description
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
• G726-32
• G729a
Default setting: G711u.
If the first codec fails, then second preferred codec is tried.
Default setting: blank
If the second codec fails, then third preferred codec is tried.
Default setting: blank
To use only the preferred codec for all calls, select yes. (The call fails
if the far end does not support this codec.) Otherwise, select no.
Default setting: no
When set to Default, the Cisco IP phone responds to an Invite with a
200 OK response advertising the preferred codec only. When set to List
All, the Cisco IP phone responds listing all the codecs that the phone
supports.
Default setting: Default
To enable the use of the G.729a codec at 8 kbps, select yes. Otherwise,
select no.
Default setting: yes
To enable silence suppression so that silent audio frames are not
transmitted, select yes. Otherwise, select no.
Default setting: no
To enable the use of the G.726 codec at 32 kbps, select yes. Otherwise,
select no.
Default setting: yes
Voice Settings Configuration