Build longer fiber runs without changing the network architecture. The AddOn ISFP-100-SM15-AO is a compatible 100BASE-LX SFP transceiver for single-mode fiber, supporting distances up to 15 km. That reach makes it suitable for inter-building links, remote closets, and other Fast Ethernet deployments where copper is not practical. LC connectivity keeps installation straightforward and aligns with common fiber patching standards. For organizations that need procurement flexibility, the TAA-compliant designation helps satisfy sourcing requirements in public-sector and regulated environments. This module is a focused fit for teams maintaining established 100 Mb infrastructure. It preserves compatibility with existing SFP-based platforms while extending reach across longer fiber spans. When the goal is dependable transport over single-mode fiber, not unnecessary feature creep, this transceiver delivers the right balance of distance, compatibility, and purchasing control.