Avaya BCM50 Konfigurationsanleitung PDF herunterladen (Seite 39)

Chapter 2 System telephony networking overview 39

Networking Configuration Guide

Lines used for networking

External (trunk) lines provide the physical connection between BCM and other systems in a

private or public network.

The BCM50 numbers physical lines from 061 to 124. Default numbering depends on the type and

connection to the BCM (EXP1 - EXP2).

VoIP trunks: Although a VoIP gateway does not use physical lines, it is easier to think of them

that way. Therefore, in the BCM, lines 001 to 012 are used for VoIP trunk functionality.

BCM networking configurations that use PRI and T1 lines, require specific DTM modules.

• DTMs configured for PRI are used for incoming and outgoing calls (two-way DID). Incoming

calls are routed directly to a BCM DN that has a properly configured and assigned target line.

All outgoing calls made through PRI, are initiated using the destination codes.

• DTMs configured for T1 can have digital lines configured as Groundstart, E&M, Loop,

or DID.

Target lines are virtual communication paths between trunks and telephones on the BCM system.

They are incoming lines only, and cannot be selected for outgoing calls or networking

applications. With target lines, you can concentrate incoming calls on fewer trunks. This type of

concentration is an advantage of DID lines. BCM target lines allow you to direct each DID number

to one or more telephones. VoIP trunks also require target lines to direct incoming traffic. Target

lines are numbered 125 to 268.

Telephones can be configured to have an appearance of analog lines or multiple appearances of

target lines.

Types of private networks

There are several ways you can create private networks. Configuration can be based on such things

as cost of trunks, proximity of network nodes, size of the private network, and business

requirements for communications.

VoIP-based networking also requires an understanding of IP features such as codecs, jitter buffers,

Quality of Service (QoS) function, and silence compression.

The services provided within networks is based on the type of trunks and the protocols assigned to

the trunks. All trunks within the network should be running the same protocols, to provide a

technically sound and stable network.

The following links are procedures to set up basic networks to advanced networks, using the

support protocols within BCM:

• “Routing-based networks using T1 E&M lines” on page 40

Note: PRI B-channels cannot be assigned as line appearances. PRI

B-channels, or “trunks”, can only be configured into PRI line pools for

inbound routing through target lines with receive digits or outbound routing

through destination codes.

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Avaya BCM50 Konfigurationsanleitung Seite 39