user manual

Chapter 14 Authority Group
X6004 User’s Guide
140
Figure 115 SIP Extension: Advanced Screen
Each field is described in the following table.
Table 48 SIP Extension: Advanced Screen
LABEL DESCRIPTION
Codec Setting
Select the type of voice coder/decoder (codec) that you want this extension to use
when communicating with the X6004. See Section 14.1.1 on page 126 for more
information on voice codecs. The following codecs (shown in highest quality to
lowest quality order) are supported by the X6004:
information on voice codecs. The following codecs are supported by the X6004:
•G.711A (typically used in Europe)
• G.711µ (typically used in North America and Japan)
• G.729A
•G.722
• G.722.2
• G.723.1 - you must activate support for this codec in the Configuration > PBX
> Server Configuration > SIP Server screen.
•G.726
When two SIP devices start a SIP session, they must agree on a codec.
If these SIP extensions are assigned to videophones, you must specify the video
codecs used for video calls. The X6004 allows the following video codecs to
passthrough:
•H.261
• H.263
•H.264
•MP4
See Section 14.1.2 on page 127 for more information on video codecs.
Codec Pool
This column indicates the codec types not used by this extension. You can add a
codec type to be used by this extension by highlighting it and hitting the Right
button.
Codec List
This column indicates the codec types used by this extension. You can organize
the priority of the codecs by highlighting it and clicking the Up or Down buttons to
move the codec higher or lower in priority. The SIP extension attempts to use the
higher priority codecs first and tries the lower priority codecs next. You can
remove a codec type from being used from this extension by highlighting it and
hitting the Left button.
Extra Setting