The DONGWE Technologies DW-D5685-01CQ is a Four-Channel, Pluggable, Parallel, Fiber-Optic QSFP+ Transceiver for InfiniBand FDR/QDR/DDR/SDR,16G/10G/8G/4G/2G fiber channel , PCIe and SAS Applications. This transceiver is a high performance module for short-range multi-lane data communication and interconnect applications. It integrates four data lanes in each direction with 56 Gbps bandwidth. Each lane can operate at 14.025 Gbps up to 100 m using OM3 fiber or 150 m using OM4 fiber. These modules are designed to operate over multimode fiber systems using a nominal wavelength of 850nm. The electrical interface uses a 38 contact edge type connector. The optical interface uses an 12 fiber MTP (MPO) connector. This module incorporates DONGWE Technologies proven circuit and VCSEL technology to provide reliable long life, high performance, and consistent service.QSFP+ SR4 is one kind of parallel transceiver. VCSEL and PIN array package is key technique, through I2C system can contact with module.