LOS Drop
of incomming optical power level causes BER of 10-3
or worse
OOF A1,
A2 incorrect for more than 625 us
LOF If
OOF persists of 3ms
B1
Error Mismatch
of the recovered and computed BIP-8
MS-AIS K2
(bits 6,7,8) =111 for 3 or more frames
B2
Error Mismatch
of the recovered and computed BIP-24
MS-RDI If
MS-AIS or excessive errors are detected, K2(bits 6,7,8)=110
MS-REI M1: Binary coded count of incorrect
interleavedbit blocks
AU-AIS All
"1" in the entire AU including AU pointer
AU-LOP 8 to 10 NDF enable or 8 to 10 invalid pointers
HP-UNEQ C2="0"
for 5 or more frames
HP-TIM J1: Trace identifier mismatch
HP-SLM C2: Signal label mismatch
HP-LOM H4 values (2 to 10 times) unequal to
multiframesequence
B3
Error Mismatch
of the recovered and computed BIP-8
HP-RDI G1
(bit 5)=1, if an invalid signal is received in VC-4/VC-3
HP-REI G1
(bits 1,2,3,4) = binary coded B3 errors
TU-AIS All "1" in the entire TU incl. TU
pointer
TU-LOP 8 to 10 NDF enable or 8 to 10 invalid pointers
LP-UNEQ VC-3: C2 = all "0" for
>=frames;
VC-12:
V5 (bits 5,6,7) = 000 for >=5 frames
LP-TIM VC-3: J1 mismatch; VC-12: J2 mismatch
LP-SLM VC-3: C2 mismatch; VC-12: V5 (bits 5,6,7)
mismatch
BIP-2 Err Mismatch
of the recovered and computed BIP-2 (V5)
LP-RDI V5 (bit 8) = 1, if TU-2 path AIS or signal
failure received
LP-REI V5 (bit 3) = 1, if >=1 errors were detected
by BIP-2
LP-RFI V5
(bit 4) = 1, if a failure is declared
Abbreviations :
AU Administration
unit
HP High
path
LOF Loss
of frame
LOM Loss
of miltiframe
LOP Loss
of pointer
LOS Loss
of signal
LP Low
path
OOF Out
of frame
REI Remote
error indication (FEBE)
RDI Remote
defect indication (FERF)
RFI Remote
failure indication
SLM Signal
label mismatch
TIM Trace
identifier
TU Tributary
unit
UNEQ Unequipped
VC Virtual Container
C container
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