The SFP optical module (Small form-factor pluggable transceiver) is a compact, hot-pluggable network interface module used for both telecommunication and data communications applications. It is a modular slot for a media-specific transceiver in order to connect a fiber-optic cable or sometimes a copper cable.
It has the same function as fiber optical port, but more convenient replacement, and Maintenace.
Wanglink has 20KM -120KM SFP optical modules for sale. We provide a 5-year warranty, and for the product, it is good quality and has excellent performance. can fully compatible with HUAWEI, Cisco, H3C, ZTE and so on Brand OLT.