The Gigalight GP-5524-12CD is an SFP optical transceiver designed for long-haul data transmission. It operates at a data rate of 1.25 Gbps using a 1550 nm wavelength, which allows it to bridge distances of up to 120 km. To achieve this range, the module utilizes a DFB laser transmitter paired with an APD photodiode and a trans-impedance preamplifier, all managed by an internal MCU control unit. This module features a standard LC duplex connector and is built to comply with SFP MSA and SFF-8472 standards, ensuring it works reliably with hardware from Cisco, Tp-Link, D-link, and HP, as well as SONET OC-24-LR-1 systems. It runs on a 3.3V power supply and is rated for operating temperatures between 0 °C and 70 °C. Because it uses a Class I laser, it is safe for use in standard networking environments where high-capacity, long-distance connectivity is required.