1.25Gbps Cisco Compatible Gigabit SFP Transceiver - SMF - 1550nm Tx/1310nm Rx LC

The device transmits at 1550nm wavelength and receives at 1310nm wavelength. 1550nm FP laser and 1310nm PIN Photodetector. 1550nm Tx – 1310nm Rx. Supports Links up to 20km over SMF. Compliant with SFP MSA and SFF-8472 with duplex LC Connector.

eBay