Avaya BCM 4.0 Networking Guide de configuration télécharger pdf (Page 715)

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Appendix B ISDN overview 715

BCM 4.0 Telephony Device Installation Guide

2-way DID

With PRI the same lines can be used for receiving direct inward dialing (DID) and for making

direct outward dialing (DOD) calls.

The dialing plan configured by your customer service representative determines how calls are

routed. Consult your customer service representative to determine whether or not this feature is

compatible with your service provider.

Dialing plan and PRI

The Dialing Plan supports PRI connectivity to public and private networks. The dialing plan is a

collection of features responsible for processing and routing incoming and outgoing calls. All PRI

calls must go through a dialing plan.

Notes about the dialing plan:

• allows incoming calls to be routed to sets based on service type and digits received

• provides the ability to map user-dialed digits to a service type on a Call by Call basis

• allows long distance carrier selection through user-dialed Carrier Access Codes

Consult your customer service representative to determine how your dialing plan is configured.

ISDN hardware

To support connections to an ISDN network and ISDN terminal equipment, your BCM must be

equipped with a BRI S/T Media Bay Module (BRIM) or a Digital Trunk Media Bay Module

(DTM) card configured for PRI.

The following describes the hardware:

• “PRI hardware”

• “BRI hardware”

PRI hardware

The Digital Trunk Media Bay Module (DTM) is configured for PRI. In most PRI network

configurations, you need one DTM configured as PRI to act as the primary clock reference. The

only time when you may not have a DTM designated as the PRI primary clock reference is in a

network where your BCM system is connected back-to-back with another switch using a PRI link.

If the other switch is loop-timed to your BCM system, your DTM (PRI) can be designated as a

timing master.

If your BCM has more than one DTM configured as PRI, you must assign the first DTM as the

primary reference, the second DTM as the secondary reference.

If the system has a BRI module, it should be set as the timing master when a DTM in the same

network is defined as the primary reference.

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