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COMSPHERE 3000 Series Carrier
3-26 December 1994 3000-A2-GA31-80
3. Using a Phillips screwdriver, loosen the screw
holding the circuit pack lock and rotate the lock to
the open position (Figure 3-16).
4. At the front of the carrier, hold the SDU vertically
with the faceplate latch in the open position, and
insert the circuit card into the top and bottom card
guides of the slot labeled SDU, to the left of
Slot 1. Slide the circuit card into the slot until the
backplane connector is seated firmly. Press the
latch to secure the SDU in the carrier, rotate the
circuit pack lock back into the closed position and
tighten the screw.
If the carrier’s power transformer unit is operating,
all indicators on the SDU’s faceplate light briefly
as the SDU performs a self-test routine. On
completion of the test, all indicators go off except
the green OK indicator. If there is an NMS
connection and DSUs in the carrier that are on the
NMS’ or modem’s poll list, the yellow Diag In
and Diag Out indicators also flicker periodically
as the NMS polls the devices in the carrier.
5. After at least one DSU or modem has been
installed in the carrier, check that the SDU is
functioning properly by polling selected DSUs or
modems for health and status.
• If there is an NMS connection, poll the DSUs
or modems for health and status (refer to the
NMS Connection section).
• If the SDCP is already installed, select each
DSU or modem in turn and request its health
and status (refer to the Shared Diagnostic
Control Panel (SDCP) Installation section).
Figure 3-16. Circuit Pack Lock