Ethernet over Fiber | Fiber Lit Buildings and Metro Ethernet Providers

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Looking At Ethernet Over Fiber

Ethernet over fiber, described in the IEEE 802.3 specification for Ethernet technology, may not be for everyone. But, in many cases, it may not only be desirable, but indispensable. Let's take a look at its evolution, its pros and cons, and at how it may be helpful.

The Ethernet standard has come a long way since its first adapter was released for sale in 1981. Its initial ten Megabit per second speed seemed amazing at the time, but now looks downright slow. This ancient technology used "thicknet" coaxial cable, which was quite difficult to use due to its inflexibility.

As "thicknet" cable was replaced with the easier-to-handle "thinnet" cable, speeds also increased. Eventually, "thinnet" was replaced by "twisted-pair wire" cables, which are easier yet to handle and feature even faster speeds. "Unshielded twisted-pair" cables, currently the most common variety of transfer media, have advanced to the point where they can now handle speeds of up to ten Gigabits per second.

But, even the most advanced twisted-pair wire technology is subject to both electromagnetic interference and cross-talk. Both of these problems can negatively affect the reliable transfer of digital data. At high speeds, the problem is even worse. Sources of interference that wouldn't have too bad of an effect on lower speed networks can have a devastating effect on higher-speed networks. Deployment of a twisted-pair wire, ten Gigabit network would require both careful planning and a rigid set of certification testing to ensure that everything will work as it should.

Fiber cabling may have an initial higher cost, but even at the fastest speeds, it's entirely resistant to either cross-talk or electromagnetic interference. So, fiber can provide much more reliable data transmission at up to ten-Gigabit speeds. Also, unlike the old copper wire technologies, you don't have to be near as careful to keep data cables away from electrical cables. So, planning the data cable layout has just become easier.

Granted, this new technology might not be for everyone just yet. If your company is already wired with either Cat 5 or Cat 6 twisted-pair cable, upgrading to fiber could be cost-prohibitive. And, it's likely that you don't yet need ten-Gigabit speeds on your network.

However, in certain cases it's hard to get by without the higher data transfer speeds that Ethernet over fiber can offer. If you're setting up a high-performance computing cluster, or if you're working at a research institute where massive amounts of research data get transferred on a regular basis, then this new technology is simply indispensable. If you need to know more about it, you'll find plenty of information on the web.

January 27, 2012, 6:45:55 pm, America/Chicago