Specifications

3-12 Optical Switches 4000326 Rev A
Troubleshoot Alarm Conditions
Introduction
The information in this section provides possible solutions to the following types of
alarm conditions:
• Switch
• Power supply
Troubleshooting Switch Alarms
The following table shows the possible causes of switch alarms and their solutions.
Alarm
Condition
Status Possible Causes Possible Solutions
OK No alarms. No action required.
One or more power supply voltages are
out of specification.
Refer to
Troubleshooting
Power Supply Alarms
later in this section.
Software Self
Test
FAIL
Optical power level is out of specification.
Refer to the Optical
Power A or Balarm,
below.
Received optical power at the input of the
switch is out of specification.
Verify the input power
level is within
specification.
Optical Power
A or B
High or Low
The nominal and/or threshold values are
not set properly.
Verify that the nominal
and threshold values
are set correctly.
Manual Mode Manual
The switch has been placed in manual
mode.
Proceed to the Switch
Setup menu, and place
the switch in
Automatic mode.
External Control Exctl1
The switch is being controlled by an
external source.
Determine why the
external control has
taken control of the
switch, and resolve the
problem.
Note: External control
may be desirable in
some systems.
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