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Chapter 3. Operation
DSU Status LEDs
The DSU status LEDs display the operational condition of the
Nx56/64 included in the TSU 100. It also reflects the status of
the DBU in the TSU 100e.
3-4
Name
OK (green)
Indicates the operation is in the normal
mode and no errors have been detected.
Test
Indicates that one of the interfaces is
(yellow)
operating in a test mode. This includes a
self-test or a test loopback. When lighted,
this LED also indicates that normal data
flow is not occurring in at least one of the
module ports.
Alarm (red)
Indicates an alarm condition has been
detected. When the alarm condition is no
longer valid, the OK LED activates (turns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 or select Alarm by
pressing
have been corrected, the alarm which
caused the activation of the Alarm LED can
be viewed under the Unit History Menu.
TSU 100 User Manual
Description
. If the alarm conditions
Shift+8
61202052L1-1
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