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Procedure 7-5
Replacing an NT4K50 side interconnect left
Use this procedure to replace the side interconnect left circuit pack in an access
bandwidth manager (ABM) shelf.
Action
Step
1
2
3
4
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Replacing modules in a common-equipment shelf 7-11
CAUTION
Service-affecting
When you pull this circuit pack out of its slot, you thereby
remove the terminations for various backplane signals,
resulting in signal degradation and possible loss of traffic.
Loss of functionality
All connectors on the side interconnect left must be
disconnected before removing the circuit pack. This results
in a loss of the following functions:
• backplane signal terminations
• breaker interface panel (BIP) control
• external synchronization interface (ESI)
• parallel telemetry
• control network
• RS-232 DTE
• RS-232 OPC
• serial telemetry
• cooling unit
• orderwire extension
• local craft access panel 1
• local craft access panel 2
• copper-distribution shelf metallic test access
Action
Ensure that all connectors are labeled with the same designations as the
label on the side interconnect left circuit pack.
Remove the ABM shelf cover as shown in Chapter 3, "Removing covers and
grilles."
Disconnect all cables from the circuit pack connectors.
Loosen the two hexagonal screws located on the side of the circuit pack: one
screw is located beside the label Parallel Telem ; the other is located between
the two LCAP labels.
—continued—
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