Synchronization
• Local (internal) or loop timed (recovered from network)
• Pointer activity monitoring
Local (diagnostic) and line (network) loopback
Payload mapping
• POS with 1 + X^43 self-synchronous scrambler
SONET/SDH compliance
• Telcordia (Bellcore) GR-253-CORE (as applicable)
• ANSI T1.105, T1.231
• ITU-T G.707, G.957, G.825 (as applicable)
Supported SONET/SDH alarm and signal events
• Signal failure bit error rate (SF-ber)
• Signal degrade bit error rate (SD-ber)
• Signal label payload construction (C2)
• Path trace byte (J1)
• Section
• Loss of signal (LoS)
• Loss of frame (LoF)
• Error counts for B1
• Threshold crossing alarms (TCA) for B1
• Line
• Line alarm indication signal (LAIS)
• Line remote defect indication (LRDI)
• Line remote error indication (LREI)
• Error counts for B2
• TCA for B2
• Path
• Path alarm indication signal (PAIS)
• Path remote defect indication (PRDI)
• Path remote error indication (PREI)
• Error counts for B3
• TCA for B3
• Loss of pointer (LoP)
• Positive stuffing event (PSE)
• Negative stuffing event (NSE)
• Path unequipped indication signal (PUNEQ)
• Path payload mismatch indication signal (PPLM)
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