Avaya BCM 4.0 Networking Guide de configuration télécharger pdf (Page 270)

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270 Chapter 24 Dialing plans

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Using Carrier codes

A multi-digit Carrier access code contains an Equal Access Identifier Code (CAC) followed by a

Carrier Identification Code (CIC). The CIC identifies the carrier that handles the call. The Carrier

Access Code table stores the CAC digit pattern that you define for your region.

In most cases it is not necessary to change the default values.

About Carrier access codes

The following points apply to carrier access codes:

• You can define up to five carrier codes.

• Two entries will be predefined in North America, but you can remove these defaults.

• Each entry consists of an equal access identifier code prefix (one to six digits) and a carrier

identification code length (one digit, 1 to 9).

• Each entry is identified by the prefix digits themselves.

Configuring call routing

Call routing allows you to define how calls are routed by your BCM system.

Call routing decides what path an outgoing call takes using the digits that are dialed. It is

sometimes called Automatic Route Selection (ARS).

When you select an internal line and dial, the system checks the numbers you enter against the

routing tables. If the number you dial starts with a destination code, the system uses the line pool

and dials out digits specified by the route assigned to that destination code, and then dials the rest

of the number that you dialed.

Routing service replaces a number of manual tasks, including:

• entering a line pool code

• dialing an access code for a long distance carrier

• deciding which line pool to use according to the time and day

You can set up routing to take advantage of any leased or discounted routes using information

supplied by the customer. The system cannot tell what lines are cheaper to use.

For Call by Call service selection (PRI only), the installer defines destination codes for various call

types over PRI lines (for example, Foreign Exchange, TIE Trunk, or OUTWATS). The user dials a

number using the intercom button without entering any special information. For more information

see “Provisioning for Call by Call limits with PRI” on page 274.

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