Avaya B5800 Bedienungsanleitung PDF herunterladen (Seite 32)

central voicemail system, at each branch you have the option to still use the local

Embedded Voicemail for auto attendant operation and for announcements to waiting

calls. See Configuring Modular Messaging on page 164 for more information. Note that

for this configuration, Embedded Voicemail licenses are required.

For more information about licensing, see Licensing on page 16.

Branch PSTN call routing considerations

Each B5800 Branch Gateway system can support its own external PSTN trunks. When

deployed in an Avaya Aura

network, you have considerable flexibility over where outgoing

PSTN calls should emerge from the network and similarly where incoming calls should be

routed.

For examples of some of the options available, see

Branch PSTN call routing examples on

page 325. The examples demonstrate the following options:

• Centralized call control on page 325 — External calls at a branch site can be rerouted to

be dialed out at another site. This can be done for reasons of call cost and call control.

For example, the central site may have a bulk call tariff for national and international calls

that would benefit all branches.

•

Branch PSTN Override on page 328 — Having configured the branch to send outgoing

external calls to the Avaya Aura

Session Manager for onward routing, there may be

cases where a specific number should still be routed via the branches own PSTN

trunks.

•

PSTN Fallback on page 330 — The B5800 Branch Gateway can be configured to allow

some calls that would normally use the Avaya Aura

Session Manager line to be routed

via the PSTN when the Avaya Aura

Session Manager line is not available.

The various methods used in the these examples can be combined to match the customer's

needs. However the main aim should be as follows:

• To keep the branch configuration as generic as possible, i.e. to use the same PSTN call

control in all branch configurations. This simplifies maintenance of multiple branches.

• To centralize as much of the PSTN call control in the Avaya Aura

Session Manager as

possible. Again this simplifies maintenance and control.

B5800 Branch Gateway configuration methods

There are two ways to configure and manage the branches in your B5800 Branch Gateway

system – locally using Manager or centrally using Network Management.

Planning

32 Implementing the Avaya B5800 Branch Gateway November 2011

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