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15. Installing the Alarm System
This part describes how to install the Alarm System in the system. The Alarm
System is based on an Alarm Interface Unit (ALIU), which is an option board that
can be installed in the LAN Interface Unit. One ALIU is required for each site.
The ALIU monitors the system for hardware and software failures. It provides
outputs for visual and audible alarms to the central office or customer's alarm
system as minor, major, and critical alarms. It also provides visual indicators of
system alarms. (See Fig. 15-1 for the connections between the ALIU and the central
office or customer's alarm system.)
The connection procedure includes connecting an RS-232-C port on the ALIU face
panel to one of the base LIU's RS-232-C ports. (See Fig. 15-2 for the front panel
layout of the ALIU.) A second connector is then cabled to the central office. This
cable must be provided by the customer. (Refer to Table 15-A for the pin
assignments for the 37-pin customer interface connector.)
The ALIU is equipped with a set of options that can be set for specific purposes on
site. The default settings and the options are shown in Table 15-B. If the defaults are
to be changed, the LIU must be opened and the jumpers changed.
EQUIPMENT:
1
1
TOOLS:
1
NT4G46BK Alarm Interface Unit Option Kit
per ALIU, optional custom-built cable for connection to the customer's
equipment . (See Table 15-A for pin designations.)
Medium Phillips screwdriver.
Installing the Alarm System 123
Practice 450-1011-201
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