Cisco ISDN GW 3241 Manual de usuario descargar pdf (Pagina 52)

ISDN gateway administration

supporting examples in the online help: see the online help topics “Understanding the dial plan”, “Example

dial plan rules”, and “Dial plan syntax”.

Each dial plan comprises a set of rules. The ISDN gateway checks calls against the dial plan starting at the

top of the list of rules. The first rule to match the condition of the call will be invoked.

When the ISDN gateway receives a new incoming call, it selects the appropriate dial plan, then compares

the called number (if available) to the condition of each rule in that dial plan until a match is found. When a

match is found, no more rules are checked, and the action of the matching rule is used to determine what

should be done next; typically the outgoing part of the connection will be initiated, calling a number

specified by the action, or the connection will be rejected and the incoming part terminated.

If a dial plan contains no rules, or if no rules' conditions match the called number, calls are rejected by

default.

Because rules are checked in order and the first matching rule is used, place rules with specific conditions at

the top of the list and place rules with general conditions (for example, ‘Match any called number’) at the

bottom of the list.

It may take some experimentation to create the dial plan that you require. The ISDN gateway provides a

facility so that you can test the dial plan to see how your set of rules acts on a particular number. See the

online help topic “Displaying and testing the dial plan”.

Basic call routing

The simplest configuration is to create a dial plan that will:

 connect any IP to ISDN call that has been routed to the ISDN gateway to the number that the caller has

dialed (using any free enabled port)

 connect any ISDN to IP call to the auto attendant of your MCU

For more information about the above configuration, refer to the Getting Started Guide that accompanied

the ISDN gateway (also available on the Codian web site).

Advanced call routing

There are a number of ways in which you can use the dial plan for advanced call routing: for joining ISDN

calls to a conference on the MCU, for allocating bandwidth, and for specifying how IP telephone calls will

be forwarded to the ISDN network. These configurations are described in basic detail in the sections below.

Refer to the online help for further details, for example dial plans, and for dial plan syntax: see the online

help topics “Understanding the dial plan”, “Example dial plans”, and “Dial plan syntax”.

Joining ISDN calls to a conference on the MCU

You can configure the dial plan to join calls to a particular conference on an MCU. Usually, part of the

original dialled number will be the conference identifier.

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Cisco ISDN GW 3241 Manual de usuario Pagina 52