10G Ethernet: can copper cut the mustard?

Copper's coming, but fibre's here already.

If 10Gigabit Ethernet has a problem, it's multiple personalities. 10G over fibre is well established as a network backbone technology, but in past generations it's been Ethernet over copper - and especially telephone-style twisted pair cabling - that has brought the big upsurge in usage and sales.

While it's true that 10G over twisted pair is getting cheaper and less power-hungry, will it ever be cheap enough? And even if it is, how long it will take before it makes sense for server manufacturers to build it in?

"Most [10G] shipments to date have been optical fibre," says Jag Bolaria, senior analyst at the Linley Group. "We think in 2007 the market was about 700,000 switch ports, and this year will be something in the order of 1.2 to 1.3 million. To put that in perspective though, Gigabit is over 100 million ports and Fast Ethernet is over 200 million."

The problem is that fibre is too pricey to replace Gigabit to the server or desk. 10G over copper could fill the latter role, but is still maturing - with the exception of CX4, which is a short range (up to 15m) technology using relatively bulky cables.

The great hope among networking suppliers has been 10GBase-T, the standard for 10G over shielded or unshielded twisted-pair (STP/UTP) copper. It allows 10G to run up to 100 metres - or further, in some cases - over Cat6 cabling.

Initial versions of 10GBase-T were costly and power-hungry, with server NICs costing over $500 and only just fitting within the 25W per slot specification for PCI Express (PCIe) expansion cards.

Fresh chips

However, new chips on the way will make a big difference by halving its cost and power consumption, argues Kamal Dalmia, VP of marketing at Teranetics. His company recently began sampling a dual-port 10GBase-T PHY (or transceiver chip) that it claims needs just 6W per port.

Other developers have also announced lower-power PHYs for delivery later this year or next, including Aquantia, Broadcom and Solarflare. All will be backwards-compatible with slower versions of Ethernet, so 10G switches and NICs can be used within existing networks.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Bryan Betts

Techworld.com
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Kurt Hegetschweiler

Brother PocketJet PJ-773 A4 Portable Thermal Printer

It’s perfect for mobile workers. Just take it out — it’s small enough to sit anywhere — turn it on, load a sheet of paper, and start printing.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?