ADTRAN ATLAS 800PLUS, User Manual

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Chapter 1. Introduction
61200226L1-1 ATLAS
_
800
PLUS
User Manual 1-5
T1 Bandwidth Manager
As a T1 Bandwidth Manager, ATLAS _ 800
PLUS
combines the functions of a T1
CSU/DSU, an intelligent channel bank, a T1 Multiplexer, and DACS into a single
platform. The Bandwidth Manager supports a wide range of data applications
including T1 “drop and insert,” channel grooming, and wide area data transport.
ATLAS is ideal for point-to-point configurations or access to public networks. For
optimization of existing equipment and network resources, ATLAS can be paired
with ADTRAN’s TSU product offerings to support a variety of data and analog
voice applications (see Figure 1-4).
Figure 1-4. T1 Bandwidth Management
ISDN Access Switch
The ATLAS _ 800
PLUS
includes an advanced access architecture for switching dial-
up calls to specific ports or DS0s. As an access switch functioning in a user-to-user
network and user-to-user mode, ATLAS consolidates multiple basic rate ISDN
(BRI) connections onto T1/PRI access lines. Additionally, BRI-to-BRI, BRI-to-PRI,
and PRI-to-PRI switching are supported. ATLAS also converts between ISDN D
channel (PRI or BRI) and T1 robbed bit signaling, allowing a non-ISDN PBX to
access a more efficient ISDN facility. For network optimization, when bandwidth
is not being used for switched applications such as video conferencing, switched
connection mapping dynamically allocates bandwidth to the PB for voice traffic.
Call Filtering allows you to program the call types that will be answered and/or
originated on a per-user basis.
WAN Overbooking
The WAN Overbooking feature of ATLAS _ 800
PLUS
allows you to oversubscribe
switched bandwidth for situations where simultaneous access to the network by
every subscriber is not required. WAN Overbooking reduces telecommunications
expenses while still giving your subscriber base the connectivity they require.
Local subscriber-to-subscriber connections are made without accessing the net-
work at all, resulting in even more efficient use of wide area bandwidth (see Fig-
ure 1-5 on page 1-6).