Avaya BCM50 Konfigurationsanleitung PDF herunterladen (Seite 369)

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Chapter 43 VoIP trunk gateways 369

Networking Configuration Guide

Figure 112 Internal call from Meridian 1 tandems to remote PSTN line

Since the VoIP trunks are configured into line pools, you can assign line pool codes to users who

have been assigned access to the VoIP trunks. However, if you intend to set up your system to use

fallback, so that calls can go out over PSTN if the VoIP trunks are not available, you must use

routes and destination codes to access the VoIP trunk line pools.

Local gateway programming

The VoIP trunk access point at each system is called a gateway. The gateway to your system, the

local gateway, determines how incoming and outgoing calls will be handled.

The H323 and SIP Media Parameters tabs determine a number of system settings. These values

need to be coordinated with the other systems on the network to ensure that all features work

consistently across the network. Media parameters include setting:

• the order of preferred codecs

• voice activity detection

• jitter buffer size

• codec payload size

• IP fax transmission availability on the network

The local gateway parameters define how the BCM prefers call signaling information to be

directed through VoIP trunks. Call signaling establishes and disconnects a call.

If the network has a gatekeeper (H.323 trunks only), the BCM can request a method for call

signaling, but whether this request is granted depends on the configuration of the gatekeeper.

Ultimately, the gatekeeper decides which call signaling method to use.

Head office

VoIP trunk

(with MCDN, optional)

Node B

Calgary

Node C

Ottawa

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