Issue 5 November 2000
363-206-208
Equipment and Front Access Cable Installation for the DDM-2000 OC-12 Multiplexer
Lucent Technologies - Proprietary
See Notice on first page
(3) Dress and secure all cables in the bay.
OC-3/OC-12 Bay Intershelf Office Alarm Cabling
(1) for a DDM-2000 OC-3/OC-12 combined bay application where the
DDM-2000 OC-3 shelf (or shelves) office alarms are to be multed to the
DDM-2000 OC-12 shelf, connect the ED-8C727-21, Group 224 or Group
225 office alarm mult cable J256 of the DDM-2000 OC-12 shelf to the
ED-8C724-21, Group 423 office alarm cable P256 of the DDM-2000 OC-3
shelf mounted directly above the DDM-2000 OC-12 shelf per Figure 3-12
on page 3-57.
NOTE:
Multing between additional DDM-2000 OC-3 shelves in the bay is
covered in 363-206-204,
DDM-2000 OC-3 Multiplexer Installation
Manual
.
(2) Dress and secure all cables in the bay.
Parallel Telemetry Cabling - Front Access
NOTE:
Parallel telemetry is not available in OC-12, Release 7.
Description
NOTE:
Perform this procedure if specified in the order.
Parallel telemetry is a minimum set of alarm and status outputs in the form of
contact closures which can be reported to a maintenance center through a
telemetry system. Connection of parallel telemetry requires a parallel telemetry
system in the office, and thus parallel telemetry is only used in a central office
environment.
There are two options for cabling parallel telemetry:
Cable directly to telemetry equipment
Cable to another shelf.
Unless otherwise specified, shelf 1, the bottom shelf in the bay, should be cabled
directly to the office parallel telemetry per the following procedure. Additional
shelves in the bay are daisy-chained up from shelf 1. The shelf identification (SID)
number for the parallel telemetry is determined by backplane wiring and the wiring
assignments within the mult cable. If shelf positions in a bay are skipped, then SID
numbers for shelves above the empty position will not match the shelf positions in
the bay.
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