Exfo FTB-800 Series for FTB-1 Manual do Utilizador descarregar pdf (Página 300)

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Test Results

290 FTB-700G/800 Series

Alarms/Errors

 ERDI-VCD (Enhanced RDI - VT Connectivity Defect) - SONET

LP-ERDI-CD (LOP - Enhanced RDI - Connectivity Defect) - SDH

RX: Bits 5, 6, and 7 of the Z7 (SONET) / K4 (SDH) byte contain the “110”

pattern, and bit 8 of the V5 byte contain “1”, in five consecutive VT/LP

superframes.

TX: Generates a “110” pattern for bits 5, 6, and 7 of the Z7 (SONET) / K4

(SDH) byte, and “1” for bit 8 of the V5 byte.

 ERDI-VPD (Enhanced RDI - VT Path Payload Defect) - SONET

LP-ERDI-PD (LOP - Enhanced RDI - Path Payload Defect) - SDH

RX: Bits 5, 6, and 7 of the Z7 (SONET) / K4 (SDH) byte contain the “010”

pattern, and bit 8 of the V5 byte contain “0”, in five consecutive VT/LP

superframes.

TX: Generates a “010” pattern for bits 5, 6, and 7 of the Z7 (SONET) / K4

(SDH) byte, and “0” for bit 8 of the V5 byte.

Errors

 BIP-2 (Bit-Interleave Parity - 2 bits)

RX:

SONET: The BIP-2 error indicates a parity error by performing a

routine even-parity check over all VT1.5 bytes of the previous frame

of a composite signal (VT1.5/VT2/VT6).

SDH: The BIP-2 error indicates a Low Order Path parity error by

performing a routine even-parity check over all bytes of the

previous VC frame.

 REI-V (Remote Error Indicator - VT) - SONET

LP-REI (Low Order Path - Remote Error Indicator) - SDH

RX: REI is declared when bit 3 of the V5 byte is set to “1”.

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