Issue 5 November 2000
363-206-208
Equipment and Rear Access Cabling for the DDM-2000 OC-12 Multiplexer
Lucent Technologies - Proprietary
See Notice on first page
OC-3/OC-12 Bay Intershelf Parallel Telemetry Cabling
(1) For a DDM-2000 OC-3/OC-12 combined bay application where the DDM-2000
OC-3 shelf (or shelves) parallel telemetry is to be multed to the DDM-2000
OC-12 shelf, obtain an ED-8C724-20, Group 386 parallel telemetry cable listed
in Table 2-5 on page 2-38 and connect it to J22 of the DDM-2000 OC-12 shelf.
(2) Route the parallel telemetry cable to the side of the bay and connect to P54 of
the DDM-2000 OC-3 shelf directly above the DDM-2000 OC-12 shelf, as shown
in Figure 2-14 on page 2-61.
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
.
(3) Dress and tie the cables as close to the backplane as possible without touching
any backplane pins.
TBOS Telemetry Cabling - Rear Access
NOTE:
TBOS is not available in OC-12, Release 7.
Description
Telemetry byte-oriented serial (TBOS) is a serial telemetry interface providing system
alarm and status data to a maintenance center and remote equipment switch (RS)
capability from a maintenance center.
A cable connection from the telemetry equipment provides up to eight displays and can
accommodate up to eight DDM-2000 OC-12 shelves (a shelf is assigned a display). A
central office shelf and its associated remote terminal shelf (or shelves) will typically be
assigned displays associated with this single interface connection. Additionally, other
DDM-2000 OC-12 shelves in the bay may be assigned remaining displays associated
with the single interface connection. This is accomplished using intershelf mult cabling.
Connection of TBOS telemetry requires a TBOS telemetry system in the office, and
thus TBOS telemetry is normally only used in a central office environment.
As mentioned in the above description, a TBOS cable is required to be routed
from the TBOS telemetry system to the DDM-2000 OC-12 bay to accommodate
the maximum of three shelves in a bay.
The TBOS intershelf mult cable also provides intershelf mults for the craft inter-
face terminal (CIT) and modem (when provided). Installation of this mult cable is
covered in the “Mult Cable Installation Procedure”.
Summary of Contents for DDM-2000 OC-12
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