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1 m SFP+ 10G copper cable: links adjacent switches without optics or modules.
SM5220-1M is a ready direct-attach cable with integrated SFP+ connectors: it replaces a pair of optical modules and a patch cord when the devices sit next to each other in one rack. 10 Gbps at a lower cost and with none of the optics' power draw. The standard way to stack switches and connect servers in a server room.