ZyXEL Communications ISG50 User Manual
Chapter 29 Extension Management
ISG50 User’s Guide
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29.3.4 The Extension Advanced Screen
Use this screen to configure advanced settings for this extension. The fields available varies
depending on the extension type. Click the Advanced tab in any of the SIP extension configuration
screens to view the screen as shown.
depending on the extension type. Click the Advanced tab in any of the SIP extension configuration
screens to view the screen as shown.
Figure 300
Extension Add/Edit: Advanced
Each field is described in the following table.
Table 158
Extension Add/Edit: Advanced
LABEL
DESCRIPTION
Codec
Select the types of voice coder/decoder (codec) that you want this extension to support
when communicating with the ISG50. This is configurable for a SIP extension. The
following codecs (shown in highest quality to lowest quality order) are supported by the
ISG50:
when communicating with the ISG50. This is configurable for a SIP extension. The
following codecs (shown in highest quality to lowest quality order) are supported by the
ISG50:
•
G.711 alaw (typically used in Europe)
•
G.711 ulaw (typically used in North America and Japan)
•
G.729
•
G.722
•
G.723.1
•
G.726
for more information.
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 ISG50 allows the following video codecs to pass through:
used for video calls. The ISG50 allows the following video codecs to pass through:
•
H.261
•
H.263
•
H.264
•
MP4
for more information.
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 double-clicking it or highlighting it and hitting the
Right button.
type to be used by this extension by double-clicking it or highlighting it and hitting the
Right button.