SPF optical module is called Small Form-factor Pluggable, that is: small hot-pluggable optical transceiver module. The SFP module is half the size of the GBIC module, and more than twice the number of ports can be configured on the same panel.#10gopticaltransceiver #10gfibertransceiver #10gtransceiver #opticaltransceivermodule #cwdmtransceiver #opticaltransceiver #fiberopticaltransceiver https://www.glsunmall.com/product/sfp-10g-cwdm-1270-10-optical-transceiver-module.html