Avaya B5800 Bedienungsanleitung Seite 13

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Chapter 1: Overview
The Avaya B5800 Branch Gateway is a single-platform solution with multiple deployment options that
enable seamless, user-centric access to Avaya Aura
®
Messaging, Avaya Aura
®
Conferencing, Avaya
Aura
®
Presence services and much more. It's complimentary to any existing networking solution, adding
communications and collaboration functionality in a “thin” device designed for branch use. Supporting
either distributed, centralized, or mixed network deployments, the B5800 Branch Gateway is adaptable
to meet the needs of specific features and applications of individual employees in each branch location.
The result is a smooth migration between architectures. In addition to centralized SIP endpoints, the B5800
Branch Gateway can concurrently support other IP and TDM endpoints for a community of centralized
and distributed users on the same platform. Ideal for customers wanting applications deployed in customer
data centers and/or in the branch itself, the B5800 Branch Gateway enables the branch to cost effectively
deliver the range of communication tools without complex infrastructure and administration.
Branch user deployment models
B5800 Branch Gateway can be deployed in the Distributed, Centralized or Mixed Branch user
models.
Distributed Branch user model — In this model, call processing for the branch phones
is provided locally. Non-IP phones are connected to B5800 Branch Gateway and IP and
SIP video endpoints are administered with B5800 Branch Gateway as their controller.
Access to and from the rest of the Avaya Aura
®
network is via the B5800 Branch Gateway
system's Avaya Aura
®
Session Manager link across the enterprise WAN. This connection
allows for VoIP connectivity to other B5800 Branch Gateway systems, to centralized
trunking and to centralized applications such as conferencing and Modular Messaging.
Centralized Branch user model — Certain 9600 Avaya SIP phones can use the B5800
Branch Gateway as a survivability gateway (see
Supported telephones on page 21 for
more information). In normal operation, these phones register directly to the Avaya
Aura
®
Session Manager in the enterprise core and get services from core applications
such as the Communication Manager Feature Server. The local B5800 Branch Gateway
can still be accessed as a SIP gateway connected to the core Avaya Aura
®
Session
Manager to provide access to local PSTN trunks and services when required. If WAN
connectivity to the Avaya Aura
®
Session Manager is lost, the SIP phones automatically
register with and get services from the B5800 Branch Gateway. When connection to the
Avaya Aura
®
Session Manager is available again, failback occurs where the SIP phones
return to being controlled by Avaya Aura
®
Session Manager.
Mixed Branch user model — Each B5800 Branch Gateway system can support
extensions using the Centralized Branch user model and extensions using the Distributed
Implementing the Avaya B5800 Branch Gateway November 2011 13
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