Acterna ANT-5 - Comparison of SDH;SONET Anomalies and Defects

Appendix D – SDH and PDH information
Acterna ANT-5 Page 137
E1 Anomaly Description
FAS Frame Alignment Signal
CRC-4 Cyclic Redundancy Check Error
E-Bit Remote Cyclic Redundancy Check Error
TSE Test Sequence Error
CODE Code Error
12.6 Comparison of SDH/SONET anomalies and defects
SDH/SONET Description
LOS Loss of signal
TSE Test sequence error (bit error)
LSS Loss of Sequence Synchronisation
LTI Loss of incoming Timer Intervals
SDH (ITU-T: G.707 G.783) SONET (ANSI: T1.105)
REGENERATOR SECTION SECTION
OOF Out of Frame OOF Out of Frame
LOF Loss of Frame LOF Loss of Frame
B1(8 bits)
Regenerator section error
monitoring
B1(8 bits) Section error monitoring
MULTIPLEX SECTION LINE (L)
B2
Nx24 bits
Multiplex section error
monitoring
B2
Nx8 bits
Line error monitoring
MS-AIS Multiplex Section AIS AIS-L L-AIS
MS-RDI
Mux Section Remote Defect
Indication
RDI-L L-Remote Defect Indication
MS-REI
Mux section Remote Error
Indication
REI-L L- Remote Error Indication
ADMINISTRATIVE UNIT (AU) STS – PATH (SP)
AU-LOP Loss of AU Pointer LOP-P SP Loss of Pointer
AU-NDF New Data Flag AU Pointer NDF-P SP New Data Flag
AU-AIS AU-AIS AIS-P SP AIS
AU-PJE AU Pointer Justification