A set of economical SFP+ 10G WDM 1270/1330nm SM 2 km modules. A set of two single-mode SFP inserts works bidirectionally on one fiber at 1270/1330nm waves at a distance of up to 2 km. The electrical interface of the 10G fiber optic SFP module complies with SFI electrical specifications. The receiver converts 10Gbit/s serial optical data into PECL/CML serial electrical data. The single-mode SFP insert is equipped with a two-wire I2C serial interface. I2C is used for serial identification, digital diagnostics and module control. The improved digital diagnostic monitoring interface enables real-time access to the SFP optical module, enabling monitoring of received optical power, laser beam current, laser output power, etc. Single-mode SFP+ modules are dedicated to work with 10Gbps Ethernet, SONET/SDH routers and switches, 10G/8.5G/4.25G/2.125G/1.0625G fiber channels and other links optical 10Gbps. Special features SFF-8431 compliant electrical interface Hot-plug capability Data links up to 10.7Gbps 1270/1330nm LD DFB transmitter 1270/1330nm PIN receiver Low power consumption Can be used for 2km SMF connection All-metal housing for excellent EMI performance Advanced firmware enables storage of client system encryption information in the transceiver Cost-effective SFP+ solution, enabling increased port density and bandwidth