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Installation
4-53510-A2-GN32-50 January 1998
Removing and Replacing a Model 3510 DSU
To remove and replace the DSU:
. Procedure
1. Disconnect the power cord – first from the outlet,
then from the connector at the rear of the DSU.
2. Remove the D8W and DTE cables from the DSU.
3. If the DSU is to be removed from service and
replaced, strap the replacement DSU the same as
the old DSU.
If the DSU is defective and needs repair, record
the defect on a tag and attach it to the DSU.
Return the DSU, power cord, and network cord to
the company per instructions included in the
Equipment Warranty and Support section of
Chapter 1.
4. If the DSU has been repaired, verify and change
the strap settings, as necessary.
5. Continue with Steps 4 through 11 of the
installation procedure.
Replacement of the Model 3510 DSU is complete.
Model 3511 DSUs
This section includes the installation procedures for the
Model 3511 DSU, which is designed for installation in a
COMSPHERE 3000 Series Carrier (Figure 4-2). These
procedures assume that the carrier has been installed
properly and is operational.
CAUTION
Discharge any static electricity
that may be present on your
body by touching a properly
grounded object (e.g., cold
water pipe, frame ground, or
data cabinet). Do not handle
the circuit card unnecessarily.
The initial installation procedure for the Model 3511
DSU requires the installation of a rear connector plate
onto the rear of the COMSPHERE 3000 Series Carrier.
After the initial installation, the DSU can be installed and
removed from the front of the carrier without first
disconnecting the DTE cables at the rear of the carrier.
This section provides the initial installation procedure and
the procedure for subsequent installations/deinstallations.
NOTE
When modular circuit cards are
installed with non-modular cards
in the same carrier, modular
circuit cards like the Model 3511
DSU must be installed on the left
side of the carrier (see
Figure 4-3).