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Chapter 29 Extension Management
ISG50 User’s Guide
469
29.3.5 The Batch Add SIP Screen
Use this screen to configure a range of extensions for IP phones on your network. To access this
screen, click the Batch Add button in the Authority Group Edit screen.
Figure 301 Batch Add SIP Extensions
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 double-clicking it or highlighting it and hitting the Left
button.
Extra
DTMF Mode Control how the ISG50 handles the tones that the IP phone using this extension makes
when you push its buttons. This is configurable for a SIP extension. 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.
MWI Enable
Check this box to enable Message Waiting Indicator (MWI) mode for this extension. The
ISG50 sends a beeping tone to the IP phone when there is at least one voicemail for this
extension.
Group Pickup
Select this to allow other extensions in the authority group with group pickup enabled to
answer calls coming into this extension and allow this extension to answer calls coming in
for any of the authority group’s extensions that have group pickup enabled. All of an
authority group’s extensions that have group pickup enabled ring when a call comes in for
any one of them.
OK Click OK to save your customized settings and exit this screen.
Cancel Click Cancel to exit this screen without saving.
Table 158 Extension Add/Edit: Advanced (continued)
LABEL DESCRIPTION