Keep copper connectivity available in SFP-based switching platforms with this Zyxel SFP-100TX compatible transceiver from AddOn Networks. Designed for 100BASE-TX operation, it provides a straightforward path for attaching copper Ethernet devices where fiber is unnecessary or unavailable. This module is useful in access-layer designs, legacy network segments, and mixed infrastructure environments that still depend on twisted-pair cabling. The TAA-compliant sourcing profile also makes it easier to align with public sector and regulated procurement requirements. For teams managing long-lived infrastructure, copper SFPs can be the difference between replacing a switch and extending its service life. That makes this module valuable in environments where port flexibility, spare-part consistency, and controlled spending matter. Use it when you need a compact, switch-side copper interface that preserves SFP slot utility while supporting 100 MbE endpoints and established cabling standards.