363-206-204
Equipment and Rear Access Cable Installation
Issue 9 October 1998
2-31
NOTE
:
In order for modem connections to be established with shelves other than
shelf 1, modem cable mults from that shelf to shelf 1 must be in place. No
shelf should be skipped.
Order Wire Interface Cable Installation
- Rear 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.
Procedure
1. Obtain a Group 346 or a ED-8C724-22 Group 31 cable (refer to Table 2-4).
2. Connect the cable to connector J51 on the rear of the shelf.
3. Route the cable to the order wire interface.
4. Stack the cable in the bay duct as shown in Figure 2-2 or Figure 2-3.
5. Dress and tie the cables in the bay as close to the DDM-2000 OC-3 back-
plane as possible without touching any backplane pins.
6. Wire-wrap the unterminated end of the cable assembly to the order wire
interface. Refer to Table 2-15.
Fan Shelf Alarm Connections - Rear
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).
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