10Mbps SFP extended copper range, Local. The ComNetTM CopperLine® CL-SFP is a plug-in, small-factor Ethernet extender module that improves bandwidth and distance of existing copper networks. It helps to avoid the costs of installing new fiber lines in the field by allowing the full 100Mbps Ethernet bandwidth to be extended over twisted pair of 2 wire or coaxial cable. Cover in a small plug-in form factor (SFP) module box, it is designed for plug-and-play installation to any 100BaseFx Ethernet unit with an MSA compatible port. These have to be used in pairs, with a CL-SFP module installed at both ends of the connection, or a CopperLine unit installed at one end.