EXFO FTB-880 - Page 132

Test Setup - Test Configurator, Timer, and System
120 FTB-700G/800 Series
BERT
Service Disruption
The Service Disruption Time (SDT) corresponds to the duration associated
to a defect that occurred in the network. For example a disruption that
occurs during a network switching from the active channels to the backup
channels or vice versa.
Note: The service disruption measurements are cleared when changing the
criteria. Service Disruption is not available for Multi-Pattern.
 Defect allows to choose on which layer and defect the service
disruption time test will be performed. Choices depend on the
selected test path.
Layer Signal Defect
Interface OTN/SONET/SDH LOS
DSn LOS, BPV, EXZ
PDH LOS, CV
OTUk OTN AIS, BDI, BEI, BIAE, BIP-8, IAE, LOF, LOM
ODUk OTN AIS, OCI, LCK, BDI, BIP-8, BEI
OPUk OTN AIS, CSF
Section/RS SONET/SDH LOF-S/ RS-LOF, B1
Line/MS SONET/SDH AIS-L/MS-AIS, RDI-L/MS-RDI, REI-L/MS-REI, B2
STS/AU Path SONET/SDH AIS-P/AU-AIS, LOP-P/AU-LOP, RDI-P/HP-RDI, REI-P/HP-REI, B3,
UNEQ-P/HP-UNEQ
VT/TU Path SONET/SDH AIS-V/TU-AIS, LOP-V/TU-LOP, RDI-V/TU-RDI, REI-V/LP-REI, BIP-2,
UNEQ-V/LP-UNEQ
DS1 DSn AIS, OOF, RAI, Framing Bit, CRC-6
DS3 DSn AIS
, OOF, Idle, RDI, F-Bit, C-Bit, P-Bit, FEBE
E1 PDH AIS, CRC-4, E-Bit, LOMF, TS16 AIS, LOF, FAS, RAI, RAI MF
E4, E3, E2 PDH AIS, LOF, FAS, RAI
BER OTN, SONET/SDH, DSn/PDH Pattern Loss, Bit Error