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Chapter 1
OCTAL BRI/U MODULE OVERVIEW
NEBS COMPLIANCE
61200186L2-1
Introduction
The Octal BRI/U Module is a member of the ATLAS family of integrated ac-
cess products, providing eight Basic Rate ISDN (BRI) U interfaces, each ca-
pable of operating in either NT or LT mode. Any port can deliver timing for
the system.
The Octal BRI/U Module combines with the ATLAS system and other
ATLAS modules to support requirements calling for multiple BRI circuits.
As many Octal BRI/U Modules can be installed in a system as can be
physically accommodated in the ATLAS chassis. Figure 1-1 shows a sample
application of the Octal BRI/U Module.
When combined with the ATLAS system and, optionally, one or more
Quad T1/PRI Modules (P/N 1200185L2 and 1200185L3), the Octal BRI/U
Module can implement an ISDN access switch, combining multiple BRI cir-
cuits into one or more Primary Rate ISDN (PRI) circuits.
The ATLAS Octal BRI/U Module (P/N 1200186L2) complies with the NEBS
(Network Equipment Building System) Level III specification for
GR-1089-CORE and GR-63-CORE. This means that the ATLAS Octal BRI/U
Module will perform normally under certain electrical and physical stresses
without posing a safety hazard to its users. However, when applications re-
quire NEBS compliance, this module should be used in the ATLAS 810
(a NEBS-compliant version of the ATLAS 800
Octal BRI/U Module User Manual
ATLAS
T1/PRI Module
BRI Module
Figure 1-1. Octal BRI/U System
PLUS
).
PBX
PLUS
1-1
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