Figure 1-4. The Access Switch; Additional Applications; Dedicated And Switched Connection Maps In A Single Platform; Wan Overbooking - ADTRAN Atlas 550 User Manual

Chapter 1. Introduction

Additional Applications

Dedicated and Switched Connection Maps in a Single Platform

WAN Overbooking

Digital Access Cross-Connect System (DACS)

1-4
BRI) and T1 Robbed Bit Signaling (RBS) giving you the flexibility to get the
speed and reliability of ISDN, while preserving your investment in non-
ISDN equipment. AMI and B8ZS line coding provides interoperability with
legacy equipment (see Figure 1-4 ). For network optimization, when
bandwidth is not being used for switched applications such as video
conferencing, switched connection mapping dynamically allocates
bandwidth to the PBX for voice traffic. Call Filtering allows you to program
the call types that will be answered and/or originated on a per-user basis.
T1 RBS D4 AMI
T1 RBS ESF B8ZS
T1 PRI
T1 PRI
The following sections describe additional applications using the ATLAS
550.
The ATLAS 550 allocates dedicated bandwidth according to any of up to five
unique connection maps. Any DS0 on any T1 circuit can be mapped to any
other DS0 on up to four T1 circuits in the system. Dedicated connection
maps can be manually invoked or automatically implemented based on the
time of day and day of the week.
Additionally, the ATLAS 550 can be configured to switch dialup calls to spe-
cific ports or DS0s based on the number that is dialed. Switched connection
mapping is supported for dialup calls placed over analog/digital voice basic
rate ISDN (BRI) or primary rate ISDN (PRI).
The WAN Overbooking feature of the ATLAS 550 allows you to oversub-
scribe 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 re-
quired connectivity. Local subscriber-to-subscriber connections are made
without accessing the network at all, resulting in even more efficient use of
wide area bandwidth.
Inherent in the ATLAS 550 architecture is the ability to cross connect, or
DACS, four T1 circuits. DACSing allows the assignment and redistribution,
or grooming, of any DS0 on any T1 circuit to any other DS0 on any of the four
T1 circuits in the system. For optimizing network resources, any of five ded-
icated connection maps can be invoked manually or automatically, based on
the time of day and day of the week.
ATLAS 550 User Manual
FXS FXS FXS FXS
FXS FXS FXS FXS
1 2 1 2 3
POWER OK OK STATUS
SYSTEM TEST TEST ONLINE
ETHERNET ERROR ERROR TEST
REMOTE ALARM ALARM MODULES
NETWORK
CRAFT
ACO

Figure 1-4. The Access Switch

BRI
ATLAS 550
BRI
4
BRI
BRI
61200305L1-1