SFP+ Cable: Connecting the Future

Seen from the outside, it looks like a rope. But inside it, when it is working, something magic appears. That is the Direct Attach Copper Cable, DAC for short. It is a type of factory terminated cable assembly used to connect two mobility access switches when forming a stack. The cable assembly consists of a high speed copper cable and two connectors. There are many different direct attach cables, including SFP cables, SFP+ cables and QSFP cables. In the following part, some basic information about SFP+ direct attach copper cable will be displayed.

What Is 10G SFP+ Cable?

10G SFP+ cable allows for a serial data transmission up to 10.3Gb/s, meeting or exceeding current Standards Specifications and is hot-removable and hot-insertable, which means that you can remove and replace them without powering off the switch or disrupting switch functions. In addition, It is designed with the same port as an optical transceiver, but compared with optical transceiver, the connector modules attached to the cable spare the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications. Generally, 10G SFP+ DAC cable is a perfect option for very short distances transmission and offers a highly cost-effective solution to connect within racks and across adjacent racks.

SFP+ Active DAC Cable And SFP+ Passive DAC Cable

In many cases, SFP+ cable assemblies can be classified into types, SFP+ active direct attach copper cable and SFP+ passive direct attach copper cable.
Passive SFP+ copper cables requires little to no direct power to operate, and are extremely affordable with the length ranging from 0.5m all the way up to 7m. Passive copper cables contain no electrical components, and offer high-speed connectivity between active equipment with SFP+ ports. While active copper cables, similar in construction to passive DACs, contain electrical components in the connectors that boost signal levels and extend signal reach. This makes active copper cables more expensive than passive copper cables; however, they can connect the Converged Network Adapter (CNA) to a top-of-the-rack switch over longer distances than passive copper cables.

Conclusion

When choosing SFP+cables, length and signal strength are always something to think about. When the distance between connection points exceeds 7m, it is highly recommended to use 10G SFP+ active cables to ensure signal, otherwise, we would like suggest you choose 10G SFP+ passive cables, as they are targeted for ranges up to 7m and provide a good working solutions. FS.COM can provide you with all sorts of length options and optimized signal strength. It can also design a special SFP+ cable according to your demand. All of them are 100% compatible with well-known brands like Cisco, HP, Juniper, Extreme, H3C and so on. Please do not hesitate to contact us on pricing and availability.

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