Codec Preference Selection On The Ip Deskphone - Avaya 1230 Administration

would become
AUDIO_CODEC1
AUDIO_CODEC2
AUDIO_CODEC3
AUDIO_CODEC4
AUDIO_CODEC5
If the ordered list of codecs is small and no matching codec is found during negotiations, the call
drops, as the audio stream cannot be established. For backward compatibility with SIP Firmware
Release 1.X, the Device Configuration file supports the DEF_AUDIO_QUALITY parameter as long
as no codec is allowed using the parameter AUDIO_CODECN, in which case the
DEF_AUDIO_QUALITY parameter is ignored and has no effect.
Specifying the DEF_AUDIO_QUALITY as High or Medium has the same effect as omitting the
parameter altogether and without specifying codec through the parameters.
If set to Low, then the list of default codecs is reversed before being sent in the SDP negotiations.
When you do not provide a text description in the Device Configuration file, the application uses the
default text description from the language file.
The AUDIO_CODECN parameters specifies the order of preference for audio codecs. If there are no
valid entries provided, then the parameter uses the default list of codecs. If you enter a codec that is
not recognized by the IP Deskphone then the parameter considers the codec as a blank entry. To
remove a codec from the list, you must first blank the entry, or change it to an invalid codec name in
the Device Configuration file.

Codec preference selection on the IP Deskphone

The Audio Quality Settings screen on the IP Deskphone allows the user to select an exact codec by
name. This grants the user full control over the audio settings used for inbound and outbound calls.
The list of codecs is populated with the names of the codecs provided during Device Configuration.
If a text descriptor is provided for a codec in the Device Configuration file, it appears after the codec
name. The Audio Codec Ordering screen allows the user to modify the order of preference of the
codecs. To change the list of available codecs, you must perform an update through Device
Configuration. The IP Deskphone creates the ordered list from the list of codecs in the Device
Configuration file. The user can reorder the list using the Preferences menu on the IP Deskphone.
On subsequent Device Configuration updates, at start time, or during other updates, the ordered
codec list of the user is synchronized with the list in the Device Configuration file. This
synchronization makes both lists equal. If the user creates an order that is different from the one in
the Device Configuration file, the IP Deskphone appends it to the end of the list.
March 2015 SIP Software for Avaya 1200 Series IP Deskphones-Administration
Comments? infodev@avaya.com
Codec preference selection on the IP Deskphone
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