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Using the Cisco TelePresence ISDN Gateway for voice-only calls
Cisco TelePresence ISDN Gateway 2.1 Online help (Printable format) 14 of 135
Dial plan configuration
You can configure the dial plan to restrict particular called numbers to voice-only calls. In this way, you
can configure the ISDN Gateway to allow particular outgoing/incoming ISDN calls to be video-
conferencing calls. Using the dial plan therefore allows you greater flexibility (if you need it) than using the
global settings on the ISDN settings page.
You can use the dial plan to place a call where the ISDN Gateway will start sending DTMF tones after a
telephone call has connected. This is useful if there is a call through the ISDN Gateway to a device which
is perhaps behind another gateway which only supports DTMF to decide how to route the calls. The caller
is not required to additionally enter the DTMF codes manually on the telephone keypad but instead can
have the call re-routed automatically using the dial plan of the ISDN Gateway.
For more information about configuring the dial plan, refer to
Understanding the dial plan, Adding and
updating dial plan rules, and Example dial plan rules.
Calling a PSTN telephone from an MCU
If you want to call someone on a regular land-line telephone into a conference on the MCU, you must add
the ISDN Gateway as a participant, using one of the following methods:
specify it as a gateway with an extension.
call a particular number registered to a common gatekeeper.
call the ISDN Gateway by IP and let the ISDN Gateway itself work out which number to call
based on dial plan rules.
Whichever method you use, you must have a dial plan configured such that a rule is invoked that has
"Telephone" bandwidth specified for the call. Then the call will be established correctly.