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Appendix D. TSU 600 System Messages
61200.076L1-1 TSU 600 User Manual 115
Appendix D
TSU 600 System Messages
This appendix lists and defines the alarm and status
messages that appear on the TSU screen.
ALARM MESSAGES: Network Interface (NI)
Red Alarm NI unable to frame align with
incoming signal
Yellow Alarm Remote alarm indication (RAI)
being received from far end
Blue Alarm Unframed all ones (1s) (AIS)
being received at NI
Loss of Signal No signal detected at NI
STATUS MESSAGES: Network Interface (NI)
Payload On Payload loopback activated
Line On Loopback off
Loopback Off All loopbacks deactivated
Factory Restore Factory setting restored
Power On Unit powered on
Self Test Internal self-test performed