363-206-204
Equipment and Front Access Cable Installation
Issue 9 October 1998
3-23
Order wire Interface Cable Installation
- Front Access
Description
The order wire interface provides access for optional connection to an external
order wire system allowing point-to-point voice communication between adjacent
nodes in a DDM-2000 OC-3 system. The front access order wire cable previously
connected to the backplane, is wire-wrapped to the order wire interface in the
same manner as in rear access procedures. Refer to the "Order wire Interface
Cable Installation - Rear Access" in the "Equipment and Rear Access Installation"
section. The cables should be routed out of the bay, stacking cables as shown in
Figure 3-2
Fan Shelf Alarm Connections - Front
Access
Description
The DDM-2000 OC-3 fan shelf is provided as required. An alarm indication is
generated by the fan shelf in the event of a functional failure. The alarm can be
input to the DDM-2000 OC-3 shelf as miscellaneous discrete information
(environmental alarm #14).
Procedure
The fan shelf alarm output should be connected to the DDM-2000 OC-3 shelf
located below the fan shelf. The connection can be made in one of the two ways:
a. If no other environmental alarm inputs are being connected to the
DDM-2000 OC-3 shelf, connect a G457 cable between the connector on
the fan shelf alarm cable and J262 of the front access Miscellaneous Dis-
crete cable previously connected to the backplane.
b. If other environmental alarm inputs, in addition to the fan shelf alarm, are
being connected to the DDM-2000 OC-3 shelf, connect a G460 or G461
cable via a miscellaneous terminal strip to the appropriate wires on the
G441 or G442 miscellaneous (environmental) discrete cable in accordance
with information provided in the job specification. Refer to Table 3-8 and to
the "Miscellaneous (Environmental) Discrete Telemetry Cable Installation".
To Next Page
Loading...
Need help?
General
