400G QSFP112 DR4 Compatible Transceiver: 400G-QSFP112-500

Our EDGEOPTIC 400G-QSFP112-500 is a multi-vendor compatible 400G QSFP112 DR4 optical transceiver module designed for short-reach 400 Gigabit Ethernet applications utilizing parallel single-mode fiber architecture. The 400G-QSFP112-500 module employs 4-lane PSM4 (Parallel Single Mode 4) technology operating at 1310 nm wavelength, with each lane transmitting at 106.25 Gbps using PAM4 modulation to achieve an aggregate data rate of 425 Gbps. This next-generation QSFP112 form factor delivers 100G-per-lane optical density for maximum bandwidth efficiency in data center interconnects utilizing MPO-based single-mode cabling infrastructure.

Our 400G QSFP112 DR4 transceiver utilizes DML (Directly Modulated Laser) transmitters for each of the four parallel lanes, providing cost-effective optical transmission optimized for 100G-per-lane PAM4 signaling at 1310 nm. The receiver section incorporates PIN photodiodes optimized for high-speed 1310 nm operation across all lanes within a 13 nm wavelength bandwidth. The module ensures a 3 dB guaranteed optical link budget, supporting transmission distances up to 500 meters over standard single-mode fiber. However, distance is an indicative parameter calculated for identification purposes – ultimately we calculate reach taking into account minimal optical budget and average attenuation characteristics of the deployed fiber plant.

The 400G-QSFP112-500 compatible DR4 module is a hot-pluggable QSFP112 form factor transceiver with MTP/MPO-12 APC connector as the optical interface, utilizing 8 fibers (4 transmit, 4 receive) for parallel transmission. The electrical interface conforms to QSFP112 MSA, CMIS V5.0, and IEEE 802.3bs specifications, ensuring compatibility with latest-generation QSFP112 host systems across multiple vendor equipment platforms. Our 400G QSFP112 DR4 transceiver can be encoded for compatibility with latest platforms from leading vendors including Cisco, Juniper, Arista, Nokia, Huawei, and other major network equipment manufacturers deploying next-generation switching infrastructure. The module supports host-side Forward Error Correction and incorporates CDR (Clock and Data Recovery) functionality on all electrical lanes.

The transceiver includes DDM/DOM (Digital Diagnostic Monitoring) capability providing real-time operational parameters including transmitted and received optical power levels per lane, module temperature, bias current, and supply voltage. This diagnostic data is accessible via the CMIS-compatible management interface, enabling comprehensive monitoring of transceiver health and performance. The module operates within a 0 to 70°C commercial temperature range with maximum power consumption of 10W, suitable for high-density deployments with appropriate thermal management.

Standards compliance includes IEEE 802.3bs for 400 Gigabit Ethernet and 100G Lambda MSA specifications for the optical interface. The transceiver achieves multi-vendor interoperability through adherence to industry QSFP112 MSA standards, though equipment with vendor-specific module authentication may require custom EEPROM programming for full compatibility. Our 400G QSFP112 DR4 transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards.

Typical applications include intra-data center interconnects, top-of-rack to spine switch connections, and high-performance computing clusters leveraging structured MPO single-mode cabling systems. The DR4 breakout capability also enables 4x100G connectivity to individual 100GBASE-DR ports, providing deployment flexibility for mixed-speed environments. Because our focus is providing top quality service, we perform comprehensive quality verification before delivery including optical parameter measurements across all four lanes, connector cleanliness inspection, and QSFP112 transceiver EEPROM memory validation tests.