BIDI-40G-QSFP-150 is Multi-Vendor MSA Compatible QSFP (Quad Small Form-factor Pluggable) Transceiver, operating over pair of multimode optical fiber providing two optical communication lanes. BIDI-40G-QSFP-150 allows to reuse existing 10 Gbps multimode fiber infrastructure when migrating towards 40Gbps. Module has minimum guaranteed optical budget of 2 dB, which in most cases is enough to reach 150 distance using OM4 type multi-mode cable or 100m distance using OM3 type cable. However, distance is just indicative parameter calculated for comfort of identification. Eventually we calculate distance taking in account minimal optical budget and average attenuation of optical cabling in industry. This transceiver use two 20 Gbps channels each transmitting and receiving simultaneously over two wavelength on a single Multi mode fiber strand. BIDI-40G-QSFP-150 uses 20G x VCSEL Laser transmitters and which operating at nominal wavelength 850 nm and 20G x 900 nm PIN Photodiode receivers on each line totally generating 40Gbps full fuplex communication. Module support DDM/DOM optical diagnostics, which provide diagnostic information about the present operating conditions. BIDI-40G-QSFP-150 operates in Standard 0°-70°C temperature range and has double LC connector. BIDI-40G-QSFP-150 support 39.81 – 44.8 Gbps data rate and such applications as 40G Ethernet (41.25 Gbps), STM256 (39.81 Gbps), OTU3 (43.108 Gbps) and OTU3e2 (44.58 Gbps). BIDI-40G-QSFP-150 optical transceiver is multi-purpose module used in number of different places of today’s networking. Consequently, most popular applications are Internet Service Provider (ISP) Fiber To The Home aggregation and backbone, Mobile operator core and back-haul 40G applications, Data Center networking site interconnections and other optical links.