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Chapter 3. Operation
3-10 TDU 120e User Manual 61202156L2
Port Status LEDs
Port 1.1 Option Card Monitor Jacks
These are used to connect option cards to the computer.
LED
Display
Color Indicates that...
OK Green The operation is in the normal mode and no
errors have been detected.
Test Yellow One of the interfaces is operating in a test
mode. This includes a self-test or a test
loopback.
When lighted, also indicates that normal data
flow is not occurring in at least one of the
module ports.
Alarm Red An alarm condition has been detected. Any
alarm condition will activate the alarm relay for
the external alarm device. When the alarm
condition is no longer valid, the OK LED
activates (turns on).
To view an alarm condition, select the active
alarm menu item.
If the alarm conditions have been corrected, the alarm which caused the
activation of the Alarm LED can be viewed under the
U
NIT
H
ISTORY
menu.