Here we provide answers to some frequently asked questions about SFP+ DAC twinax cable, hoping it would help to deal with any confusions in related to SFP+ DAC copper cable.
Should I Choose Passive or Active SFP+ DAC Twinax Cable?
Passive SFP+ DAC twinax cable contains no electrical components, thus requires little or no power to operate. SFP+ active copper cable, on the contrary, needs DC power to integrates signal processing circuitry into its built-in connectors, making it more expensive. It is recommended to use passive SFP+ DAC when the distance is no more than 7m. As for link distance greater than 7 m (like ToR to EoR), active DACs would be required.
Can I Use a Compatible SFP+ DAC Twinax Cable on Cisco Switches?
Yes, just like optical transceivers, compatible SFP+ DAC twinax cables are made with the same industry standard as the Cisco cables. A qualified SFP+ DAC copper cable should be tested and be fully recognized by Cisco equipment to ensure proper function. Get a reliable direct attach cable manufacturer to buy SFP+ DAC twinax cable, so your compatible SFP+ DAC cable can perform equally great as the branded one—with significantly recuded cost.
Can I Use SFP+ DAC Twinax Cable in SFP Ports?
Yes, SFP+ cables are backward compatible to SFP ports and will work fine. But SFP cables are not compatible to SFP+ ports. SFP cables can be plugged into SFP+ ports but they are not designed for 10Gb/s data rates.