PRODUCT FEATURES:Supports a maximum transmission unit (MTU) of up to 9188 bytesLayer 2 encapsulationsError counts for B1, B2, B3Threshold-crossing alerts (TCAs), far end block error path (FEBE) for B1, B2, and B3 with threshold that can be setLoss of signal (LOS), loss of frame (LOF), line alarm indicator signal (LAIS), path alarm indicator signal (PAIS), loss of pointer (LOP), line remote defect indicator (LRDI), path remote defect indicator (PRDI), signal failure (SF), signal degrade (SD), line remote error indicator (line FEBE), and path remote error indicator (path FEBE)Performance monitoring-Error counts for B1, B2, B3, TCAs, and FEBE for B1, B2, or B3 with threshold that can be setLocal (internal) or loop-timed (recovered from network)Stratum 3 clock accuracy over full operating temperaturePointer activity monitoringLocal (diagnostic) and line (network) loopback1 + X^43 self-synchronous scramblerPower and input current monitoring