The Gigalight GQS-SPO400-LR4C is a QSFP+ optical transceiver designed for high-speed data transmission over single-mode fiber. It delivers a total data rate of 40Gbps, with each of its four lanes operating at 11.2Gbps, making it a reliable choice for connecting network equipment over distances up to 10km. This module utilizes a 1331nm CWDM wavelength and incorporates a PIN-TIA high sensitivity receiver with AAWG DEMUX to ensure signal integrity over long spans. Built to integrate seamlessly with Cisco systems, the device adheres to QSFP+ MSA, IEEE 802.3ba, and QDR/DDR Infiniband standards. It features a 38-pin edge connector and operates on a 3.3V supply voltage within a temperature range of 0 °C to 70 °C. This combination of technical specifications makes it suitable for network administrators managing data centers or enterprise environments where stable, long-reach 40 Gigabit Ethernet connectivity is required.