Cisco ONS 15540 ESPx, Hardware Installation Manual

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Chapter 1 Product Overview
Cisco ONS 15540 ESPx Components
1-12
Cisco ONS 15540 ESPx Hardware Installation Guide
78-16436-01
Alarms
The processor generates three alarm signals: critical, major, and minor. (See
Table 1-5 .) These signals generate visual and audible alarm signals to the
backplane, where they are connected to two DB-9 connectors that can be
connected to a central telco alarm panel. LEDs on the processor card front panel
display the status of the critical, major, and minor alarm signals, plus the status of
alarm cutoff (ACO) and history conditions.
Push-button switches on the front panel provide for the alarm cutoff and history
clear functions. (See
Table 1-5 .)
Note To clear the switch alarms, use a thin tool (such as a small
screwdriver) to press and release the button.
6 Input RXD Receive data
7 Output CTS Clear to send
8 Input RTS Request to send
9 P/gnd N/A Protective ground
Table 1-4 Auxiliary Port Pinouts for the Cisco ONS 15540 ESPx
Pin Number Direction Circuit Function
Table 1-5 Alarm Cutoff and History Clear Buttons
LED Location Description
ALARM CUT
OFF Recessed
push-button
switch When pushed, software turns off all external alarm relay control
bits until the next new alarm condition.
HISTORY CLR Recessed
push-button
switch When pushed, software turns off the HIST LED if there are no
major or minor alarm conditions.