The Cisco GLC-EX-SMD-RF transceiver module represents an advancement in networking technology, offering a blend of performance, reliability, and compliance for modern networking needs. This refurbished plug-in module is designed to facilitate Gigabit Ethernet connections over single-mode fiber, with a data transfer rate of 1 Gbps and a maximum transfer distance of 40 km. It features two LC/PC single-mode connectors, ensuring compatibility and ease of integration into existing networks. With support for Digital Optical Monitoring (DOM), it provides valuable diagnostics capabilities, allowing for real-time monitoring of the network's optical interface. The module's wide operating temperature range and compliance with multiple safety and networking standards make it a versatile choice for expanding and enhancing network infrastructure.