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Configuring the ISDN gateway
9
Step three: 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
Settings > Gatekeeper. Typically
you 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 four: 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.
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 > Gatekeeper page.
1 In the web interface, go to
Dial plan > IP to ISDN and click Add rule.
2For
Condition, select Called number matches and enter the correct match for
example 9(D*).
3For
Action, select Call this number and enter $1.
4For
Call type, select Telepho ne.
5 Leave the other values unchanged. Click
Add rule to add the rule to the dial
plan.
6 Repeat steps 1 to 5 to create a second dial plan to accept and forward the video
calls with the correct format in
Called number matches, for example 8(D*)
and for
Call type, select Video.