User's Manual

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.
Codecs preferences on the IP Deskphone
The user cannot modify the text descriptors through the IP Deskphone; the text descriptors
can only be read by the user. After the system loads the Device Configuration file, the user
preference selections are synchronized with the system codecs specified in the Device
Configuration
file. This ensures that the codecs available to the user are always set according
to user preferences.
If the user modifies the order through the IP Deskphone, then the user-defined order is saved
for the codecs that are defined as system codecs in the Device Configuration file. Codecs are
appended at the end of the list in their relative order from the Device Configuration file. Until
the user modifies the order of the codecs, the list of ordered codecs reflects the order specified
in the Device Configuration file.
The following table shows examples of the list of codecs provided by Device Configuration,
user configuration, and resulting list of codecs that the system uses for presentation and codec
negotiation purposes.
Table 68: Examples of the ordered lists of Codecs
Codecs Supported
by the IP
Deskphone
Ordered list of
codecs provided by
Device
Configuration
Ordered list of
codecs provided by
user configuration
Ordered list of
codecs used by the
IP Deskphone
A, B, C, D, E N/A A, B, C, D, E
A, B, C, D, E E, D, C, B, A E, D, C, B, A
A, B, C, D, E, F, G A, B, C, D, E A, D, E A, D, E, B, C
A, C, D, E A, B, C, D, E A, C, D, E
A, C, D, E A, B, C, E A, C, E, D
Note:
The user-defined order of the codecs can be specified/changed by means of the Custom
keys file through the section [audiocodecs]. See Custom keys file
on page 177. When the
IP Deskphone downloads the Custom keys file, the IP Deskphone performs the following
actions:
• The IP Deskphone parses the section [audiocodecs] from the Custom keys file. If the
codec specified within the file exists in the list of codecs in the Device Configuration
Codecs preferences on the IP Deskphone
SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013 227