ZyXEL Communications IP PBX X6004 User Manual page 169

Table 67 Configure a SIP Trunk
LABEL
DTMF Mode
Caller ID
Authentication
Username
Password
Codec Setting
Codec Pool
Codec List
Apply
Cancel
X6004 User's Guide
DESCRIPTION
Control how the X6004 handles the tones that the IP phones on your network
make when they push their 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.
Select this if you want to send identification when you make VoIP phone calls.
Clear this if you do not want to send identification.
Type the SIP user name associated with this extension. The IP phone registering
with the X6004 must provide this for authentication.
Type the SIP password associated with this extension. The IP phone registering
with the X6004 must provide this for authentication.
Select the type of voice coder/decoder (codec) that you want this extension to use
when communicating with the X6004. See
information on voice codecs. 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 µ-law (typically used in North America and Japan)
• G.729
• 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
This column indicates the codec types not used for these extensions. You can add
a codec type to be used for these extensions by highlighting it and clicking the
Right button.
This column indicates the codec types used by these extensions. 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 extensions attempt
to use the higher priority codecs first and try the lower priority codecs next. You
can remove a codec type from being used from these extension by highlighting it
and clicking the Left button.
Click this to save your changes.
Click this to set every field in this screen to its last-saved value.
Chapter 18 Outbound Line Group
Section 14.1.1 on page 126
for more information on video codecs.
for more
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