Cisco SFP-25G-ER-I 25GBASE-ER SFP28 iTemp Module

Cisco’s SFP-25G-ER-I brings extended-reach 25 Gigabit Ethernet connectivity to single-mode fiber in a compact SFP28 package. It is designed for network teams that need to carry high-speed links beyond standard reach while preserving the clean port density and operational consistency expected from Cisco optics. This module fits well in enterprise aggregation, campus core, and data center interconnect designs where longer optical spans are part of the architecture. The iTemp designation supports deployment in temperature-sensitive environments, making it a practical choice for network rooms, remote equipment spaces, and infrastructure that must stay online under variable conditions. For organizations standardizing on 25 GbE, this optic helps maintain a disciplined upgrade path: extended reach, single-mode fiber compatibility, and a form factor that integrates cleanly into modern Cisco switching platforms. It is the kind of component that earns its place in production by reducing compromise at the edge of the network.