User's Manual Part 3

Compact BTS Multi–Coupler Preselector Card
9-36 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004
PRELIMINARY
Introduction
The procedures in this section cover only the Multi–Coupler Preselector
Card (cMPC). The cMPC occupies the ninth slot of the CCP2 Shelf.
cMPC PWR/ALM LED States
The cMPC has a dual color (green & red) power/alarm (PWR/ALM)
status indicator LED located on its front panel. The card has its own
alarm (fault) detection circuitry that controls what is displayed on the
LED. Table 9-20 lists these states. Refer to Figure 9-14.
Table 9-20: cMPC PWR/ALM LED State
LED State Device State
Steady GREEN Operating normally
Steady RED 1. Displayed during initial
power– up.
2. Operating in a Fault condition.
OFF No DC power to card.
System Impact/Considerations
An interruption in call processing, due to the RX signal path being
broken, will occur if the cMPC must be replaced due to total failure or
marginal operation.
Required items
Documents
This manual for optimization and acceptance test procedures.
Tools
None
Replacement Unit
One cMPC (STLF4109)
Prerequisite
Coordinate this repair task with the OMC–R operator.
IMPORTANT
*
Contact the OMC–R operator before performing the replacement
procedure. Tell the operator that the Compact MPC will be replaced and
that alarms can be expected.
9