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7
Complete the settings for ISDN Port 1 as required by your network, referring to
the online help for further information. Note that all ISDN ports on the ISDN
gateway are enabled by default.
8
Click
Apply changes
9
Complete the settings for other ISDN ports as required by your network,
referring to the online help for further information.

Step four: Configure an H.323 gatekeeper

If you have H.323 endpoints, using an H.323 gatekeeper can make it easier for callers
to make their call. You can configure the ISDN gateway to use an external gatekeeper
or its own built-in gatekeeper.
To configure the use of an H.323 gatekeeper, go to
may want to add a Dial plan prefix for voice calls (for example, 9) and another for
video calls (for example, 8).
For more information refer to the online help topic: "Configuring gatekeeper
settings".

Step five: Configure the dial plan

The default behavior of the ISDN gateway is to reject all calls. You must configure a
dial plan to allow permitted calls to be placed.
Below are some simple configurations for dial plan rules. Refer to the online help for
more information on dial plan rule syntax.
IP to ISDN dial plan setup
This example allows IP codecs to dial (via a gatekeeper) the 'phone number of the
destination endpoint, using a prefix of 9 for audio calls and 8 for video calls. It
assumes that you require both video and voice calls to be made from your IP network
to ISDN and that you have set up dial plan prefixes 8 and 9 on the ISDN gateway's
Settings > H.323
1
In the web interface, go to
2
For
Condition
example 9(D*).
3
For
, select
Action
4
For
Call type
to save your configuration changes to the ISDN port.
page.
Dial plan > IP to ISDN
, select
Called number matches
Call this number
, select
Telephone
Settings > H.323
and enter the correct match for
and enter $1.
.
Configuring the ISDN gateway
. Typically you
and click
Add rule
.
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