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Plexus 9000 Planning and Engineering Guide
DS3 I/O Rear Module
Section 130-120-550
Issue 3, April 23, 2004
Telica, Inc.
5-143
General Mechanical Representation ................................................5-144
Interface Protection Buses................................................................5-146
5.12.1 Scope
This section describes rear DS3 and rear DS3 Protection modules. It
explains the module functions and connector interfaces.
The CLEI codes of the modules are as follows:
Part Numbers CLEI
Codes Comments
89-0361-A
BA9IB80AAA
89-0369-A
BA9IB90AAA
Rear Protection Module
Note:
Shaded part numbers have been “manufacture discontinued,” but
are still supported. You can use Octal DS3 rear modules instead.
5.12.2 Functional
Description
The system accommodates up to 17 IOMs. The rear DS-3 IOM can
terminate up to 3 DS-3s or STS-1s (equivalent to 84 DS-1s). The rear
modules provide three DS-3/STS-1 In and Out connectors. The rear
protection module, which is a different part number, does not have In and
Out connectors.
The system features 1:N protection of the DS-3 line interface modules.
The triple DS-3 IOM can be used in the original 85-3000, the 85-3003 or
the 85-3004 chassis.
In the 85-3000 chassis, physical slot 11 (I/O-9) is the slot for the DS-3
protection module and physical slot 7 (I/O-7) is the recommended slot for
the DS-1 protection. If the user does not desire to protect line- and trunk-
side interfaces, the system can be equipped with 17 interface modules.