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COMSPHERE 3000 Series Carrier
3-54 December 1994 3000-A2-GA31-80
Models 3151 and 3161 Circuit Card
Installation
NOTE
Before you install a 3151 CSU
or 3161 DSU/CSU circuit card in
a carrier, you must first install an
Auxiliary Backplane.
To install a 3151 CSU or 3161 DSU/CSU circuit card
in the 3000 Series Carrier, with or without the –48 Vdc
Central Office Power Unit, use the following procedure.
Procedure
1. Using a Phillips screwdriver, loosen the screw
holding the circuit pack lock, rotate the lock to the
open position, and open the latch (refer to
Figure 3-16).
2. At the front of the carrier, hold the circuit card
vertically, with the latch on its faceplate in the
open position. Insert the card into the top and
bottom card guides of one of the slots
numbered 1–16.
3. Slide the card into the slot. The ejector latch lifts
up as it engages the metal flange (refer to
Figure 3-37).
4. Press the latch up until it clicks into the locked
position to secure the circuit card in the carrier,
then rotate the circuit pack lock back into the
closed position and tighten the screw.
Filler Panels
A filler panel must be ordered and installed for each
unfilled slot in the carrier to ensure compliance with
safety requirements. This filler panel is a blank faceplate
equipped with an abbreviated circuit card, a latch to
secure it to the carrier, and a circuit pack lock to prevent it
from being removed from the carrier without use of a tool.
To install the filler panel in an empty slot:
Procedure
1. Using a Phillips screwdriver, loosen the screw
holding the circuit pack lock and rotate the lock to
the open position (refer to Figure 3-16). Open the
latch.
2. Hold the filler panel vertically at the front of the
carrier, with the faceplate latch in the open
position. Insert the blank circuit card into the top
and bottom card guides of the empty slot
(Figure 3-37), and tighten the screw.