Siemon launches SFP+ DACs for Cisco gear
New cables do not trigger warning that a non-Cisco DAC has been detected, vendor claims
In a bit to combat vendor lock-in, Siemon yesterday launched new SFP+ copper twinax direct-attach cables (DACs) programmed specifically to work with Cisco gear featuring 10GBASE-CX1 ports.
The idea is that, when these cables are plugged into the Cisco equipment, they will not trigger the warning message that a non-Cisco or third-party DAC has been detected, Siemon said. More importantly, the vendor added, these cables do not impact warranties on Cisco gear.
"To avoid having to troubleshoot substandard cables, some switch vendors incorporate encryption or ‘vendor lock' into their equipment to issue a warning message if a non-vendor approved cable assembly is plugged into a port," says John Sawdy, senior signal integrity engineer at Siemon.
"Whilst Siemon SFP+ DACs have always been compliant with IEEE and SFF industry standards with proven interoperability, we are excited to now employ encryption that prevents the warning message and offers greater peace of mind to data centre managers."
In terms of functionality, Siemon said that the SFP+ DACs were developed as a cost-effective and lower-power alternative to optical modules. This is down to the fact that 10 Gb/s SFP+ DACs and transceivers become common for top-of-rack applications in the data centre, where small access switches or port extenders connect directly to servers, Siemon said.
The vendor explained that these assemblies can easily support transfer rates up to 10 Gb/s per lane with ultra-low crosstalk.
Like Siemon's other SFP+ DACs, these Cisco-compatible ones combine a twinaxial shielded cable construction with robust die-cast housing and gold-plated contacts, the vendor said.
Siemon added that its new line of SFP+ DACs are offered in the same lengths and wire gauges as Cisco DAC assemblies, but at a "significant" cost reduction.