ADTRAN 550 Additional Applications, Dedicated and Switched Connection Maps in a Single Platform

Chapter 1. Introduction

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

POWER

SYSTEM

ETHERNET

REMOTE

CRAFT

ACO

FXS		FXS	FXS		FXS
	FXS FXS			FXS FXS
						BRI
					ATLAS 550	BRI
OK	OK	STATUS	2	3	4
1	2	1
TEST	TEST	ONLINE
ERROR	ERROR	TEST
ALARM	ALARM			MODULES		BRI
	NETWORK

BRI

Figure 1-4. The Access Switch

Additional Applications

The following sections describe additional applications using the ATLAS 550.

Dedicated and Switched Connection Maps in a Single Platform

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).

WAN Overbooking

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.

Digital Access Cross-Connect System (DACS)

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.

1-4 ATLAS 550 User Manual 61200305L1-1