ZyXEL Communications ISG50-ISDN User Manual page 470

Chapter 29 Extension Management
Each field is described in the following table.
Table 159 Batch Add SIP Extensions
LABEL
Batch Add SIP Peers
Group
Start Number
Step/Interval
Amount
SIP Auth. Password
DTMF Mode
Codec
Codec Pool
470
DESCRIPTION
Select the authority group you want these extensions to belong to.
Type the first extension number for this range of extensions. Extensions can be 3-10
digits long.
Type the value of the increment, which the ISG50 uses to create this range of
extensions.
Type the number of extensions you want to create. The number of extensions you can
create is limited by the subscription service registered on the ISG50 (see
page 229).
When you create multiple SIP extensions, you automatically create SIP accounts on the
ISG50. The user names for these SIP accounts are the extension numbers. The
passwords for the SIP accounts are also the extension numbers. To make the passwords
more secure you can add a prefix or a postfix to these extensions.
For example type "1" in the Prefix field and the SIP account passwords for the SIP
extensions you create become "1 + extension number".
You can enter up to three letters, numbers or a combination of letters and numbers in
the Prefix and Postfix fields.
Control how the ISG50 handles the tones that the IP phones using these extensions
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 the type of voice coder/decoder (codec) that you want this extension to use when
communicating with the ISG50. The following codecs 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
See Voice Codecs on page 475
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:
• H.261
• H.263
• H.264
• MP4
See Video Codecs on page 475
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.
for more information.
for more information.
Chapter 11 on
ISG50 User's Guide