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What is SFP+ Direct Attach Copper Cable?

DAC cable, or “Direct Attach Copper Cable”, is a type of copper cable which is similar to coaxial cable and also a form of high speed cable with SFP connectors on each end. As for the market nowadays, there are mainly three kinds of DAC according to the transmission rate: 10G SFP+ DAC, 40G QSFP+ DAC and 100G QSFP28 DAC in order to meet the increasing demand for cost-efficient delivery of more bandwidth. Today we will introduce the SFP+ DAC cable with the focus on types and advantages of SFP+ DAC cable.

The Types of SFP+ Direct Attach Copper Cable

SFP+ direct attach copper cable, also known as twinax cable, is an SFP+ cable assembly used in rack connections between servers and switches. It consists of a high speed copper cable and two SFP+ copper modules. It is widely used for short-distance and high speed Internet, such as gigabit network card, Gigabit switch, million server and etc. In general, SFP+ direct attach copper cable has two types, SFP+ active direct attach copper cable and SFP+ passive direct attach copper cable.
An Active DAC contains electronics for signal conditioning.
A Passive DAC does not contain electronics for signal conditioning.
It means that, if a switch provides signal conditioning integrated into a port, then a Passive DAC is used. A Passive DAC costs less than an Active DAC, but the upfront cost of the switch is more expensive. Similarly, if a switch does not provide signal conditioning integrated into a port, then an Active DAC is used. An Active DAC costs more than a Passive DAC, but the upfront cost of the switch is less.

The Advantages of SFP+ Direct Attach Copper Cable

SFP+ DAC cable sets the ball rolling in data centers mainly because of below factors.

  • More Stable
It is a design optimized for structure and reduces the use of electronic components, then further avoids the repair rate caused by the electronic component. So it will be more stable and durable.

  • Short Distance
Since DAC cable does not need patch panels or additional cables when connected to devices, as is the case with an?optical module. The module on both ends with scientific layout makes them sturdy and reliable as well as space-saving.

  • Low Power Consumption
As is know to all that denser equipment in the data center or server rooms will result in the consuming of more electrical power and production of more heat. Then more cooling systems are required. However, DAC cable can realize ultra-low power consumption and heat dissipation, which achieves the destination of energy saving and environmental protection.

Conclusion

SPF+ DAC cable provides a low power consumption and high-speed solution for data center interconnections. With the ability to support data rate of 10G, 40G and 100G, they are now widely used in optical links. If you would like to know more about SPF+ DAC cable, Fiberstore are available with custom version and brand compatible versions. All of them are 100% compatible with major brands like Cisco, HP, Juniper, Enterasys, Extreme, H3C and so on. Both passive twinax cables in lengths of 1, 3 and 5 meters, and active twinax cables in lengths of 7 and 10 meters are on the supply. You can get high quality SFP+ cables and worldwide delivery from Fiberstore.
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