EXFO FTB-800 Series for FTB-1 - Manual (Page 296)

Test Results
286 FTB-700G/800 Series
Alarms/Errors

TC-TIM-P / TC-TIM-V / HPTC-TIM / LPTC-TIM (Trace Identifier
Mismatch)
RX: The received message differs from the defined expected message.
The TC-TIM is also declared when receiving invalid ASCII characters or
when errors are detected with CRC-7.

TC-RDI-P / TC-RDI-V / HPTC-RDI / LPTC-RDI (Remote Defect
Indication)
RX/TX:

SONET: The TC-RDI is declared when bit 8 of the N1/Z6 byte frame
73 is set to “1”.

SDH: The TC-RDI is declared when bit 8 of the N1/N2 byte
multiframe 73 is set to “1”.
Errors

TC-VIOL-P / HPTC-VIOL (Violations)
RX: TC-VIOL indicates the number of B3 parity violation within the
tandem connection for STS-1 SPE/VC-3 and above.

TC-VIOL-V / LPTC-VIOL (Violations)
RX: TC-VIOL indicates the number of violation within the tandem
connection for VT6 SPE/VC-2 and below.