Nomenclature and Functions Description and Function of Components
Centillion 1200N ATM Switch User Manual 3-5
NTP 297-8103-903
Description and Function of Components

Switch/CPU Card

Figure 3-3: Front View of the Switch/CPU Card
Power/Ready/Alarm Indicator Lights
These lamps indicate the status of the switch/CPU card.
RESET Button
This button is used to reset the switch/CPU card.
RS-232C Connector
This is a 9-pin D-SUB connector used by service personnel to connect a
Maintenance Administration Terminal (MAT).
This connector is used to connect an external device for notifying the occurrence
of an irregular condition in the hardware (e.g., speaker or alarm notif ication la mp).
POWER Lighted Power on
Off Power off
READY Lighted Operating properly
Flashing Undergoing diagnosis
Off Error occurred
ALARM Lighted Error occurred
Off Operating properly