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Installing the Model 3551 DSU
3-53550-A2-GB20-10 February 1995
Installing the DSU
The initial installation procedure for the Model 3551
DSU requires the installation of a rear connector plate
onto the rear of the COMSPHERE 3000 Series Carrier
(Figure 3-2). After the initial installation, the DSU can be
installed or de-installed by simply removing the DSU
from the carrier.
Procedure
1. At the rear of the carrier, set the tab on the rear
connector plate into one of the slotted grooves on
the carrier’s backplane. Loosely fasten the screws.
Make sure the rear connector plate uses the same
slot position intended for the DSU.
2. Loosely fasten the screw attached to the rear
connector plate, allowing for slight adjustment
that may be needed when installing the DSU.
3. Change any default hardware strap settings that
may be required before installing the DSU.
Figure 3-2. COMSPHERE 3000 Series Carrier, Rear View