Cisco SFP-10GbE ER PM S10G-ER-PM-D-I= 1550nm 40km | SFP Module — S10G-ER-PM-D-I=

When the network spans more than a rack or a room, optical margin matters. Cisco’s SFP-10GbE PM, ER, SM, 1550 nm transceiver is designed for 10 GbE over single-mode fiber with extended reach up to 40 km. The 1550 nm ER design is a strong fit for inter-building links, campus backbones, and other long-haul connections where short-reach optics would fall short. This module is built for teams that need predictable performance on longer fiber paths and prefer Cisco-qualified optics in production infrastructure. I-Temp support adds deployment flexibility for environments that may see wider temperature ranges than standard office hardware. For procurement teams, the value is clear: a purpose-built transceiver that matches the distance requirement without paying for unnecessary complexity. Choose it when the design calls for long-distance 10 GbE on single-mode fiber and the network must stay consistent under real operating conditions. It is a focused, enterprise-grade optical component for infrastructure that cannot afford guesswork. Ideal For Inter-building 10 GbE links over single-mode fiber Campus backbone connections requiring extended optical reach Data center uplinks where long fiber runs are unavoidable Cisco-standardized networks needing I-Temp transceivers Why This Product 1 Extended-reach design for 10 GbE over single-mode fiber 2 1550 nm optics for long-distance optical transport 3 40 km reach for campus and inter-building links 4 Cisco-qualified module for production network consistency