2
Installation Procedures
This section provides instructions for installing standalone Model 3510 DSUs and
carrier-mounted Model 3511 DSUs. Refer to the appropriate section.

Model 3510 DSU Installation

Physical installation of the Model 3510 consists of unpacking the DSU and placing it in
its planned location. Electrical installation requires the following procedure.
Procedure
1. Coordinate the installation with the telephone company and affected digital network
user locations.
2. Configure the DSU to meet the requirements of the application (refer to
Hardware
Strapping
on page 8). Do not disable the faceplate switches now, or you will
not be able to test the DSU.
3. Find a suitable non-switched ac wall outlet capable of furnishing 90 to 132 Vac,
0.07 amps at 117 Vac. Label the circuit breaker that controls the outlet and be sure
it is set to ON.
4. At the rear panel of the DSU, insert the socket end of the power cable into the
POWER receptacle. Ensure that the connector is fully inserted. Connect the other
end to the ac outlet.
Indicators on the faceplate flash as the DSU performs an internal power-on
self-test. The green OK indicator then lights for about 20 seconds, then the red
OS/NS indicator flashes. If no indicators light, verify that the DSU is receiving
power.
NETWORK INTERFACE
POWER CONNECTOR 98-12304a
EIA-232-D/V.24
CONNECTOR
V.35 CONNECTOR

Model 3510 DSU, Rear Panel