363-206-204
Equipment and Rear Access Cable Installation
Issue 9 October 1998
2-21
Procedure
NOTE
:
Unless otherwise specified, shelf 1 (bottom shelf) should be cabled directly
to the telemetry equipment. If additional shelves are being installed in the
bay, determine from installation information whether any additional shelves
will be connected to the telemetry equipment.
Perform the following for all the shelves that require connection to the telemetry
equipment.
1. For
ACORN
TBOS processors, obtain a TBOS telemetry cable Group 348
or 349 (refer to Table 2-4). For non-
ACORN
TBOS processors, obtain a
Group 352 cable to be used in conjunction with G348 or G349 cables or
obtain a Group 395 or 396 cable to be used alone.
2. For
ACORN
processors, connect Group 348 or 349 TBOS telemetry cable
to J53 on the rear of the shelf.
3. For non-
ACORN
processors using the Group 352, 395 or 396 cable, these
cables contain a resistive circuit in its connector to provide compatibility
between the DDM-2000 and the TBOS processor. A jumper strap is
required when any of these cables are used. The jumper must be
wire-wrapped onto the DDM-2000 backplane which has a metal cover over
the backplane pins. Instructions to remove the cover and connect this
jumper strap are packaged and shipped with the cable assemblies.
4. Route the TBOS cable out of the DDM-2000 OC-3 bay per Figure 2-13 to
the telemetry system.
5. Stack the cables as shown in Figure 2-2 or Figure 2-3.
6. Dress and tie the cables in the bay and as close to the DDM-2000 OC-3
backplane as possible without touching any backplane pins.
7. Cut the TBOS cable to the desired length at the telemetry panel.
8. Wire-wrap the loose end of the TBOS cable to the telemetry system mak-
ing connections as shown in Table 2-10.
9. Repeat this procedure for each shelf to be cabled directly to the telemetry
system.
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