ADTRAN 1202076L2 - Manual (Page 111)

61202076L1-1 TSU 600 User Manual D-1
Appendix D
System Messages
This appendix lists and defines the alarm and status messages that ap-
pear on the TSU 600 screen.
Alarm Messages: Network Interface (NI)
Message Description
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