Build longer fiber links without changing the switching platform. The PSFP-1000D-S2LC40-XT is a Perle SFP module for converters and switches, delivering 1 Gbps connectivity over single-mode fiber with LC termination. It is suited to environments where copper is too short, too noisy, or too exposed for dependable transport. With Gigabit Ethernet performance and an extended optical reach, this module supports inter-building links, distributed access points, and remote equipment rooms that need stable throughput across distance. The SFP form factor keeps deployment simple and preserves port density, while the LC interface aligns with standard fiber patching practices. For teams maintaining Perle infrastructure, this module offers a precise fit rather than a generic substitute. That matters when uptime, compatibility, and predictable optical behavior are worth more than a lower-cost part that may not match the platform as cleanly. It is a practical choice for long-reach fiber designs that need Gigabit speed in a compact package.