Passive Copper Cables and SFP+ cables are

 Active cable assemblies operate with existing linear
specifications. The compliance point for passive direct attach cables are the same as host compliance test  Mellanox SFP+ cables are 10Gbps cables assembly. The cables are compliant with specifications and provide connectivity between devices Allied Telesis recommends using the following SFP+ cables listed in
SFP+ cables enable data transfer rates up to 10 Gb/s per channel at lengths up to 8.5 meters SFP+ direct attach is constructed out of a pair of SFP+ module with the optical ports replaced with a pair of
high speed cables as shown in figure H.1. SFP+ cables has build in crossover where transmitter outputs on the A Sides goes to the receiver outputs  respectively. The cable assembly shall incorporate DC blocking capacitors with at least 15 V rating on the high speed differential RX pairs. The drain