https://www.gearlinkoptic.com/products/sfp-1.25g-1550nm-40km-lc-transceiver/ GearLink's gigabit optical transceiver GCS5L0C55 is used in Gigabit Ethernet, dual-channel, and bidirectional transmission synchronous optical network (SONET). sfp 1550nm conforms to SFP multi-source protocol and SFF-8472, with digital diagnostic monitoring(DDM) function. The package of GCS5L0C55 is SFP with LC interface, the rate is 1.25G, the optical wavelength is 1550NM, and the maximum transmission distance is 40KM. Compatibility of SFP 1.25G 1550nm 40Km LC Transceiver QFX-SFP-10GE-ER 10GBASE-ER SFP+ 1550nm sfp 1g 40km EX-SFP-10GE-ER 10GBASE-ER SFP+ 1550nm 40km SFPP-10GE-ER 10GBASE-ER SFP+ 1550nm 40km Technical Specification Of SFP 1.25G 1550nm 40Km LC Transceiver Absolute Maximum Ratings of SFP 1.25G 1550nm 40Km LC Transceiver Parameter Symbol Unit Min Max Storage Temperature Range Ts oC -40 +85 Relative Humidity RH % 5 95 Power Supply Voltage Vcc V -0.5 +4 Recommended Operating Conditions of SFP 1.25G 1550nm 40Km LC Transceiver Parameter Symbol Unit Min Typ Max Case Operating Temperature Range Tc oC -10 70