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APPENDIX B
SYNONYMS AND ABBREVIATIONS
AIS
Unframed ALL ONES.
ALRM
Alarm
BED
Bit Error Detection; Set when bit errors are detected
FRM
E1 Frame Alarm
LIU
Line Interface Unit
LD
Loop-down
LU
Loop-up
LOC
Loss of Carrier; set when 255 consecutive zeros have been detected.
LOCAL Tester
NX
Next
PLOS Pattern Loss of Sync; when 6 or more bits out of 64 are received in error.
POWR Power
RDMA Receive Distant MF Alarm.
Set when bit 6 of timeslot 16 in frame 0 has been set for two consecutive multi-frames.
S/N
Serial Number
SIG
Signaling bits (AB or ABCD Bits)
SAIS
Signaling All Ones.
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