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1
The Quad Basic Rate Module
1.1 Introduction
The Cyber Backup Quad Basic Rate Module (CBUQBR) is a single width
card for use in either the CBU/14 or the CBU/6 Shelf, otherwise known
as a 'Shelf System'.
The CBUQBR connects to 4 basic rate ISDN lines providing up to 8 'B'
channels for interfacing with other application cards in the Fivemere-
Cabletron Shelf System. A Shelf System supports a single CBUQBR or
a single CBUPRI but not both simultaneously. (Please see
the Glossary of Terms used in this manual).
Management is provided via the Cyber Backup Generic Shelf Manager
(CBUGSM) which forms a standard part of the Shelf System.
Local or remote access to the cards in the shelf is by password which is
entered on the first poll of the shelf. Alarm messages from the cards in
the shelf are routed to the alarm and/or command ports on the
CBUGSM.
For cards other than the CBUQBR used in the Shelf System, please see
the relevant manual.
1.2 General Description
The CBUQBR comprises a front card and a rear interface card.
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The Quad Basic Rate Module
section 5
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