https://www.gearlinkoptic.com/products/sfp-1.25g-1550nm-120km-lc-transceiver/ GearLink's gigabit optical transceiver GCS9L0C55 is used in Gigabit Ethernet, dual-channel, and bidirectional transmission synchronous optical network (SONET). sfp 120km conforms to SFP multi-source protocol and SFF-8472, with digital diagnostic monitoring(DDM) function. The package of GCS9L0C55 is SFP with LC interface, the rate is 1.25G, the optical wavelength is 1550NM, and the maximum transmission distance is sfp 120km. Technical Specification Of SFP 1.25G 1550nm 120Km LC Transceiver Absolute Maximum Ratings 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 Parameter Symbol Unit Min Typ Max Case Operating Temperature Range Tc oC -10 70 Power Supply Voltage Vcc V 3.135 3.3 3.465 Data rate Gb/s - 1.25/1.0625 - We are committed to providing satisfactory products, solutions, and services to customers. Wuhan GearLink Technology Co., Ltd. is a professional optical transceiver companies, we provide 1 gbe sfp lx fiber transceiver, sfp sc single mode, fiber transceiver and etc. Contact us to know single mode sfp module price or more.