OC-48c/STM-16, 1-port, single mode, 1310nm,TeraMetrics module Line Rate 2.488 Gbps line rate (2.396Gb/s) transmit SPE band width. Port Density 1 port per POS-3505As Framing SONET OC-48c or SDH STM-16c framing. Internal/external transmitter clock selection. SONET/SDH error generation and analysis