Avaya BCM50 Konfigurationsanleitung PDF herunterladen (Seite 373)

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Chapter 43 VoIP trunk gateways 373

Networking Configuration Guide

4 System B recognizes the code as its own, and uses a local target line to route the call to the

correct telephone.

Fallback to PSTN from VoIP trunks

Fallback is a feature that allows a call to progress when a VoIP trunk is unavailable or is not

providing adequate quality of service (QoS).

Refer to the information under “Describing a fallback network” on page 374 for details about

setting up fallback for VoIP trunks.

By enabling Fallback to circuit-switched, also known as PSTN fallback, on the H323 Settings or

SIP Settings panels, you allow the system to check the availability of a VoIP trunk, then switch the

call to a PSTN line, if the VoIP trunk is not available. For the PSTN fallback to work on a suitable

bandwidth, QoS monitor must be enabled and a transmit threshold must be set. For QoS and

transmit threshold settings refer to Table 81.

You use scheduling and destination codes to allow the call to switch from H.323 or SIP to a PSTN

line without requiring intervention by the user.

Use the dialing plan worksheet in the Programming Records to plan your dialing requirements so

you can pinpoint any dialing issues before you start programming. If you are programming an

existing system, you can look at what numbers the users are familiar with dialing, and you can

attempt to accommodate this familiarity into your destination codes plan.

Ottawa

Dialout:

2244

Gateway: 3

dedicated VoIP trunk private network

DN 2244

Target line XXX recognizes 2244

DN 2244 assigned with target line XXX

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