Posted on June 14, 2012 by bboxadmin
Data centers consume a great deal of power,
so one of the most effective things you can do to reduce your data center’s costs is to increase its energy efficiency. Building and certifying a green data center can be well worth it if you’re embarking upon new construction, but most of us are working with existing networks and are looking for ways to make existing networks more energy efficient. Fortunately, there are ways to make your data network greener with minimal disruptions to its operation.
1. Look for Energy-Efficient Ethernet (EEE) devices.
When you add new equipment, look for Ethernet devices that meet the 802.3az Energy-Efficient Ethernet standard. This new standard can reduce power consumption by 50% or more by scaling down power during periods of low data activity. These new energy-efficient switches, NICs, and routers are totally backwards compatible with older equipment, so they work seamlessly.
2. Take advantage of remote power management.
Remote power managers are devices that enable you to remotely power down unused equipment over your network—for instance, internal company servers during nights and weekends—saving both the power used to run the equipment and the associated cooling costs. Set the power manager to automatically shut down and restart at pre-set intervals or power down manually; either way you save energy.
Most remote power managers also monitor power consumption, alert you when circuit breakers are tripped, and enable you to reboot network devices, making them an invaluable addition to a network manager’s arsenal.
Filed under: Blog Posts | Tagged: Cold Front, copper cable, data center, EEE, Energy-Efficient Ethernet Standard, fiber optic cable, green, green networks, liquid cooling, networking, remote power manager | Leave a Comment »
Posted on December 8, 2011 by bboxadmin
Fiber optic cable
is one of the fastest-growing transmission mediums for both new cabling installations and upgrades, including backbone, horizontal, and even desktop applications. Fiber offers a number of advantages over copper.
1. Greater bandwidth
Fiber provides far greater bandwidth than copper and has standardized performance up to 10 Gbps. While not currently a standard, these speeds could become a reality in future proposals and ratifications. Keep in mind that fiber speeds are dependent on the type of cable used. Single-mode cable offers far greater distance than either 62.5- or 50-micron multimode cable. In addition, fiber optic cable can carry more information with greater fidelity than copper wire. That’s why telephone and CATV companies are converting to fiber.
2. Low attenuation and greater distance
Because the fiber optic signal is made of light, very little signal loss occurs during transmission, and data can move at higher speeds and greater distances. Fiber does not have the 100-meter (9328-ft.) distance limitation of unshielded twisted pair copper (without a booster). Fiber distances can range from 300 meters (984.2 ft.) to 40 kilometers (24.8 mi.), depending on the style of cable, wavelength, and network. Because fiber signals need less boosting than copper ones do, the cable performs better.
Your data is safe with fiber cable. It doesn’t radiate signals and is extremely difficult to tap. If the cable is tapped, it’s very easy to monitor because the cable leaks light, causing the entire system to fail. If an attempt is made to break the physical security of your fiber system, you’ll know it.
Fiber networks also enable you to put all your electronics and hardware in one central location, instead of having wiring closets with equipment throughout the building.
Filed under: Blog Posts | Tagged: copper cable, fiber optic cable | 4 Comments »
Posted on April 3, 2011 by bboxadmin
If you’re accustomed to certifying copper cable
, you’ll be pleasantly surprised at how easy it is to certify fiber optic cable
because it’s immune to electrical interference. You only need to check a few measurements.
Attenuation (or decibel loss)—Measured in decibels/kilometer (dB/km), this is the decrease of signal strength as it travels through the fiber cable. Generally, attenuation problems are more common on multimode fiber optic cables.
Return loss—This is the amount of light reflected from the far end of the cable back to the source. The lower the number, the better. For example, a reading of -60 decibels is better than -20 decibels. Like attenuation, return loss is usually greater with multimode cable.
Graded refractive index—This measures how the light is sent down the fiber. This is commonly measured at wavelengths of 850 and 1300 nanometers. Compared to other operating frequencies, these two ranges yield the lowest intrinsic power loss (NOTE: This is valid for multimode fiber only.)
Propagation delay—This is the time it takes a signal to travel from one point to another over a transmission channel.
Optical time-domain reflectometry (OTDR)—This enables you to isolate cable faults by transmitting high-frequency pulses onto a cable and examining their reflections along the cable. With OTDR, you can also determine the length of a fiber optic cable because the OTDR value includes the distance the optic signal travels.
Filed under: Blog Posts | Tagged: certify, copper cable, fiber cable, fiber optic cable | Leave a Comment »