Northern Telecom DNC-50 Installation Manual page 131

124 Installing the Alarm System
The procedure assumes that the LIU has not yet been installed. If it has, the cover
can still be removed should you need to change the options. Proceed as follows:
All wiring and cabling should be routed and secured according to local
building and safety codes.
(1) Before installing the LIU that houses the ALIU, refer to Table 15-B for the
(2) Install the LIU according to Part 11. Do not power up the LIU until the rest of
(3) Plug one end of the RS-232-C cable (NT4G46AX) into Port 2 on the base of
(4) Connect the Customer Alarm Interface cable to the Customer Interface
(5) Plug the other end of the Customer Alarm Interface cable into the central office
(6) Plug in the ac power cord for the LIU. The LED on the base part of the front
(7) Test the LEDs on the ALIU by pressing the lamp test (LP TST) button. The
Practice 450-1011-201
default values of the options on the ALIU. If the options are to be changed, do
so as follows:
•
Remove the four screws on the LIU cover with the Phillips screwdriver.
•
Lift off the cover to expose the protective EMI cover.
•
Remove the single screw that fixes the EMI cover to the LIU.
•
Lift off the EMI cover to expose the ALIU board and the jumper options.
Set the options per Table 15-B.
•
Replace the EMI and LIU covers.
this procedure is complete.
the LIU, and plug the other end into the RS-232-C port on the ALIU. (See Fig.
15-1.)
Connector (P4) on the ALIU. (Refer to Table 15-A for the pin designations for
building the cable.)
or customer premises equipment.
panel of the LIU should light.
green link OK (LNK OK) LED and the three alarm LEDs (CR, MJ, and MN)
should light up while the LP TST button is pressed.
In normal running mode, the green LNK OK LED should be lit, and the three
alarm LEDs should not be lit.
- WARNING -