EXFO FTB-8100 Series Transport Blazer for FTB-500 - Manual (Page 325)

SDH Tabs
SONET/SDH Application 311
Regenerator Section RX (SDH)
Regenerator Section RX (SDH)
Press TEST, RS-MS, and RS (under RS-MS RX).
Error Analysis
FAS (Frame Alignment Signal): A FAS defect indicates that at least one A1
or A2 byte of the FAS word is in error.
B1 (BIP-8, Bit-Interleave Parity - 8 bits): The BIP-8 error indicates a
Regenerator Section parity error by performing a routine even-parity check
over all frames of the previous STM-n signal.
Alarm Analysis
³
OOF (Out Of Frame): A OOF alarm indicates that a minimum of four
consecutive errored framing patterns are received.
³
LOF (Loss Of Frame): A LOF alarm indicates that an Out Of Frame
(OOF) defect on the incoming optical signal persists for 3 milliseconds.
³
RS-TIM (Regenerator Section - Trace Identifier Mismatch): The RS-TIM
defect indicates that the received J0 Trace doesn’t match the expected
message value. RS-TIM alarm is only available when the Enable
RS-TIM check box is selected.
Note: Refer to Alarm/Error Measurements on page 47 for H/C LEDs, and Seconds
information.