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Our 200G MSA compliant QSFP56 FR4 modules are designed with 4 CWDM DFB lasers, 4 high speed photodiodes with a built-in optical MUX and DEMUX. The electrical interface to the module contains 4 independent electrical input/output channels each operating at 53.125Gb/s and based on 200G CAUI-4 in module retimed interface. The transmitter is based on DFB lasers designed for performance whilst being low cost and efficient in being low power consumption. This module is an excellent solution to your 200G data transmission requirements up to 2km across standard single-mode fibre. The integrated DDM functionality (alarm and warning features) is accessed via an I2C serial interface as per the Multi-Source Agreement (MSA) SFF-8665.