SFP+ Direct Attach Copper Cables (DAC)

R&M has introduced a new line of small-form high speed copper assemblies. Data centres increasingly need higher speeds, design flexibility and a cost-effective migration path. A new family of Small form-factor pluggable plus transceiver (SFP+) Direct Attach Copper Cables (DAC), also known as Twinax cables, has been designed to meet these requirements.

SFP+ direct attach is the optimum choice for highly cost-effective networking connectivity within a single rack and between adjacent racks. The cables meet application requirements for a high density cabling interconnect system capable of 10G per channel transmission rates and are ideal for point-to-point Top of Rack (ToR) applications.

The full portfolio includes eight cable lengths, from half a meter to seven meters. SFP+ assemblies are offered in different wire gauges depending on length.

The cables have been designed with practical installation and network management in mind: they can be removed and replaced without powering off the switch or server. A programmed EEPROM signature allows the host to differentiate between a copper cable assembly and a fibre optic module and provides length and serial number data for traceability, which can lead to considerable time and cost savings when patching and re-patching systems.

All cables are fully compatible with the SFP Multi-Source Agreement. R&M SFP+ DAC assemblies are compliant to all equipment with MSA compliant ports according to SFF-8431, SFF-8432, SFF-8472, SFF-8083.


As data demand ramps ever higher, researchers are looking to innovative amplifier designs to help transport a broader light spectrum through optical fibres, finds Andy Extance


Duncan Ellis shares his views about the increased focus on automation from network operators, and how the physical layer has so far stubbornly resisted the move


Switching off copper networks where fibre has been deployed is the end game, so why are so few operators doing it, wonders Pauline Rigby


With demand for fibre to the premises increasing, Keely Portway looks at the role training plays in ensuring installation skills remain available to meet this growing demand

Analysis and opinion