Table 51 Sip Extension: Advanced - ZyXEL Communications X6004 User Manual

Each field is described in the following table.

Table 51 SIP Extension: Advanced

LABEL
Codec Setting
Codec Pool
Codec List
Extra Setting
DTMF Mode
MWI Mode
Group Pickup
Apply
Back to Peer List
X6004 User's Guide
DESCRIPTION
Select the type of voice coder/decoder (codec) that you want this extension to use
when communicating with the X6004. The following codecs (shown in highest
quality to lowest quality order) are supported by the X6004:
• G.711 a-law (typically used in Europe)
• G.711 u-law (typically used in North America and Japan)
• G.729A
• G.722 (pass-through)
• G.722 AMR-WB (pass-through)
• G.723.1 - you must activate support for this codec in the Configuration > PBX
> Server Configuration > Server screen.
• G.726
See Voice Codecs on page 182
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 Video Codecs on page 183
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.
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.
Control how the X6004 handles the tones that the IP phone using this extension
makes when you push its buttons. One use of the tones is to distinguish between
numbers when trying to dial a PSTN phone number. You should use the same
mode as your VoIP service provider. The choices are:
• rfc2833 - Follow the RFC 2833 standard and send the DTMF tones in RTP
packets.
• inband - Send the DTMF tones in the voice data stream. This works best
when you are using a codec that does not use compression (like G.711).
Codecs that use compression (like G.729) can distort the tones.
• info - Send the DTMF tones in SIP messages.
Check this box to enable Message Waiting Indicator (MWI) mode for this
extension. The X6004 sends a beeping tone to the IP phone when there is at least
one voicemail for this extension.
Check this box if you want to enable the group pickup feature for this extension. If
this extension is added to a pickup group, then the phone at this extension rings
when any extension that is part of this pickup group is called. See
page 195 for more information on group pickup.
Click this to save your changes.
Click this to go back to the Authority Group configuration screen without saving
your changes.
Chapter 13 Authority Group
for more information.
for more information.
Chapter 15 on
175