Posts tagged: switch

Warning Signs of Bad Switches

By admin, July 14, 2012 8:10 am

Lighting is used everyday in your home and switches are used to turn the lights on and off. If you’ve ever noticed that when you flip the switch on or off and there’s a snap, crackle, or pop, then it’s pretty clear that your switch is defective and it’s time to replace it. In fact, switches will sizzle like a fine T-bone steak when the contact get really worn.

If you here the sizzling sound, chances are the contacts are arcing and the switch is heating up. Not good! Get it shut off A.S.A.P. and shut of the circuit. You’ll actually be able to smell the plastic burning as the contacts get hot enough to melt the plastic switch parts. I know, it doesn’t smell like burnt steak, but close.

You will also notice the lights flickering if the contacts are weak or burnt. This is accompanied by the sizzling sound also. You may also notice that the switch handle is loose and may wiggle towards one side or the other. This may indicate a cracked or broken switch. Yet again, a crackling or sizzling sound can also be as simple as a loose wire connection to the screw terminal of the switch. This connection could be taken loose, cleaned, and reinstalled.

The point is, these are all very specific warning signs that a switch is getting bad and is likely defective. There is a need to change them right away when these warning signs rear their ugly heads. And I know what you’re going to say, “I’ll get to it tomorrow.” The only problem is that tonight might be the night it gets hot enough to start an electrical fire and burn down your home. So if you identify the problem, fix the problem. At least, if you don’t want to tackle it yourself and you want to call in a professional, turn off the power to the circuit. That way, you and I both can get a good night’s sleep.

Photo: Timothy Thiele

JDSU Announces Customer Trials with New Twin WSS Optical Products

By admin, March 8, 2012 2:08 pm

JDSU (News – Alert), a provider of test and measurement solutions for the telecommunications industry, announced it is conducting trials with its new Twin (News – Alert) 1×20 Wavelength Selective Switch (WSS) with network equipment manufacturers.

The demand for faster network and higher optical performance is growing to meet the increasing bandwidth demands arising out of increased usage of video and online applications through new devices such as smartphones and tablets.

The new Twin WSS, part of its family of TrueFlex optical products, provides flexible grid spacing and improved node level performance for network speeds beyond 100G. These products provide maximum flexibility for these Self Aware (News – Alert) Networks of the future.

The Twin WSS gives network equipment manufacturers (NEMs) the choice to deploy products on or off the International Telecommunication Union (ITU) grid, giving them increased flexibility, improved spectral efficiency and lower overall component costs.

 “JDSU’s TrueFlex line of products are designed to address the realities of what it takes to support Self Aware networks that will operate at rates faster than 100G,” said Alan Lowe, president of the CCOP business segment at JDSU, in a statement. “We are leapfrogging the competition by developing products based on decades of optical design expertise that can support any network frequency – on or off the ITU grid.”

JDSU TrueFlex products include Twin Wavelength Selective Switch (WSS), Dual Multi-Cast Switch, Dual Multi-Cast Switch, Quad Optical Channel Monitor, Hybrid Raman-Erbium Amplifier and EDFA Array.

The Twin WSS features independent 1×20 WSS’s that support the ‘route and select’ architecture at the heart of next generation networks. The Dual Multi-Cast Switch supports up to 8 degrees of optical switching and 16 transceiver ports. The Quad Optical Channel Monitor has 4 inputs and a scanning filter to support the demanding needs of Flexible Spectrum (News – Alert) and dynamically reconfigured Self Aware Networks.

The Hybrid Raman-Erbium Amplifier allows 100G or 400G signals to travel further with less performance degradation and leverages JDSU’s leading high power optical pump and EDFA technologies. The solution features several EDF Arrays integrated into a highly compact form factor that will provide amplification within flexible multiplexing and de-multiplexing modules.

The test and measurement company hopes to begin shipments of the TrueFlex product suite within the second half of calendar year 2012.

In a related announcement, JDSU said that Infinera (News – Alert), a provider of long-haul wavelength division multiplexing (WDM) optical networking technology, has selected the JDSU ONT 100G Tester Solution to help ensure the high quality and reliability of its new Multi-Terabit DTN-X platform. 

Edited by Jennifer Russell

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Belden adds new IP54 switches from the Octopus range to its Hirschmann(TM) product program

By admin, February 9, 2012 9:25 am

Thursday, Feb 09, 2012

Gigabit Ethernet via M12 Ports

The new Gigabit OCTOPUS from Belden’s Hirschmannâ„¢ product range is a managed IP54 switch that was especially developed for road and rail vehicle applications that require fast data connection. To this end the switch has two Gigabit Ethernet uplinks for twisted-pair cables (1000 BASE-TX) connected via vibration-proof M12 ports. Eight Fast Ethernet ports (10/100 BASE-TX) are provided for connecting terminal equipment. These are also designed for M12 connectors and support PoE. They make it possible to power equipment such as IP cameras, Voice-over-IP phones or WLAN Access Points without the need for additional cables. The switch also offers various management and security functions plus fast redundancy protocols. It can thus be used to install high-availability Gigabit backbones in public transport vehicles, for instance giving passengers fast internet access during their journey.

This switch, which has an operating range of -40°C to +70°C, fulfils the EMC and fire prevention requirements of the European standards that govern use in rail vehicles. The fanless design and redundant 48V power supply also guarantee high operational safety.

The PoE facility makes use of the phantom power method in which the terminal equipment is powered via the same wire pair that carries the data, making it possible to use thinner cables and less complicated connectors. The power available to each terminal is 15W.

The switch, which comes in a robust and compact die-cast zinc housing (338 mm x 189 mm x 70 mm) designed for wall mounting, can be quickly taken into operation via plug and play. It can be configured using a command line interface (CLI), Telnet, BootP, DHCP option 82 or HiDiscovery, or via the ACA11-M12 auto configuration adapter. RMON, SysLog support and port mirroring are provided for diagnostic purposes. Alarms are output via an additional signalling contact and LEDs on the front of the housing display the unit’s status plus that of the network and the power supply.

Redundancy protocols such as HIPER Ring and rapid spanning tree ensure high network availability. The supported security mechanisms include IP and MAC port security, SNMP V3, SSH V3, SNMP access settings (VLAN/IP) and access control via IEEE 802.1x. More detailed information can be displayed via a standard web browser. The integrated SNMP interface offers additional centralized management functionality that makes it possible to use network management software such as Industrial HiVision from Hirschmannâ„¢.

This new Gigabit OCTOPUS is an innovative addition to the IP57 switches in Belden’s Hirschmannâ„¢ product series. “Gigabit ports with vibration-proof M12 connection technology are quite new,” says Product Manager Rolf-Dieter Sommer. “They enable high data rates to be reliably conveyed via twisted pair cables, making it possible to handle the steadily increasing network load in public transport vehicles with IP communications.”


Source: Belden

Integra Telecom Expands Carrier Ethernet Capabilities

By admin, January 5, 2012 10:47 pm

Integra Telecom (News – Alert), a provider of fiber-based business grade networking, communications and cloud solutions will be expanding its carrier Ethernet capabilities to Switch Communication’s Las Vegas SuperNAP data center to drive enterprise growth in Nevada region.

Integra’s expanded fiber network could enable Switch’s enterprise customers to receive the services that are needed for the company to continue to be successful including the company’s high capacity Ethernet, metro DWDM (dense wavelength-division multiplexing) and long-haul transport services.

Switch’s Nevada SuperNAP facility provides colocation, connectivity and cloud services for Fortune 1000 corporations, as well as mid-sized enterprises, government agencies and other businesses conducting mission-critical business on the Internet. While many data centers today are faced with severe issues resulting from improper management and control of equipment-generated heat, Switch claimed that it offers the most forward looking designs for space and power in the industry. Currently, the data center boasts over 31,000 cabinets, 24/7/365 on-site security, safety, operations and a 500,000 square feet of additional on-net office space.

Switch asserted that its enterprise customers have huge data transfer needs and with Integra’s high speed fiber network it can provide the service, support, reliability and latency they need to ensure the continued success of their business.

Officials with Integra ascertained that it is an important step for them to continue their goal of providing their high-speed fiber network to strategic locations throughout the west. Switch’s client base includes wholesale and enterprise retail customers that need high-capacity transport between their location and SuperNAP.

Integra provides its solutions to over 100,000 business and carrier customers in eleven states including Arizona, California, Colorado, Idaho, Minnesota, Montana, Nevada, North Dakota, Oregon, Utah and Washington.

Want to learn more about the latest in communications and technology? Then be sure to attend ITEXPO East 2012, taking place Jan. 31-Feb. 3 2012, in Miami, FL. ITEXPO (News – Alert) offers an educational program to help corporate decision makers select the right IP-based voice, video, fax and unified communications solutions to improve their operations. It’s also where service providers learn how to profitably roll out the services their subscribers are clamoring for – and where resellers can learn about new growth opportunities. To register, click here.

Stay in touch with everything happening at ITEXPO. Follow us on Twitter. online casino canada .


Nathesh is a contributing editor for TMCnet. To read more of Nathesh’s articles, please visit his columnist page.

Edited by Jamie Epstein

Electro Standards Laboratories Unveils Single Channel LC Duplex A/B Switch

By admin, January 5, 2012 12:08 pm

Electro Standards Laboratories (ESL), a provider of complex network switches, data acquisition products, and MIL spec cables, has unveiled a new remotely controllable fiber optic A/B switcher to provide backup for LC duplex networks.

The latest offering from ESL – Model 6301 single channel LC duplex A/B switch, is a part of the company’s line of QuickSwitch fiber optic switches. It is an LC Duplex A/B Switch with Telnet and graphical user interface (GUI) remote control.

According to ESL, the new QuickSwitch Single Channel LC Duplex A/B Switch facilitates a device connected to the COM port access to the A or B port. It can be controlled locally by manually operating the front panel pushbutton or remotely from the RJ45 Remote Control port located on the rear of the unit. The unit can be remotely controlled by using an Ethernet 10/100 Base-T connection and either Telnet commands or graphical user interface.

Providing backup for LC duplex networks, the new fiber optic A/B switcher helps user to easily change switch position, lockout front panel pushbutton control or obtain switch status via Telnet command interface or graphical user interface for critical switching to a backup device or network.

Featuring cutting edge MEMS-based mirror/prism technology that supports Gigabit data rates, the 6301 A/B switch is IP Addressable with secure setup/configuration access limited by password protection, in order to provide secure, reliable network alternate-path switching.

In addition, the 6301 is also service protocol transparent as well as bit-rate and data transparent with optical data throughput scalability.

According to ESL, all fiber ports on the new fiber optic A/B switcher are LC Duplex, multimode, 50/125 micron and support a wavelength of 850 nm.

Apart from featuring easy to use, simple point and click operation via standard Web browser, the new QuickSwitch 6301’s GUI Software also features a CE and UL listed table mount Wide Range Power Supply option with 100 VAC/240 VAC, 50Hz/60Hz and IEC (News – Alert) 60320 C14 inlet instead of standard power module to support international applications.

According to ESL, the LAN access provides users with access to control, across the LAN or over the Internet, if user network is configured accordingly.

In addition, the new A/B switcher also retains last switch position in the event of a power loss and continues to pass data. The unit can maintain its position and continue to pass data when the power is regained.

In other news, ESL recently announced a new fiber optic ST duplex A/B softswitch that features dual wavelength, remote serial control and optional graphic user interface (GUI).

The Model 6190 Fiber Optic A/B Switch allows users to access two separate devices, ports A & B, via connection through a device connected to the Common port of the switch, company officials said.

Want to learn more about the latest in communications and technology? Then be sure to attend ITEXPO East 2012, taking place Jan. 31-Feb. 3 2012, in Miami, FL. online casino . ITEXPO (News – Alert) offers an educational program to help corporate decision makers select the right IP-based voice, video, fax and unified communications solutions to improve their operations. It’s also where service providers learn how to profitably roll out the services their subscribers are clamoring for – and where resellers can learn about new growth opportunities. To register, click here.

Stay in touch with everything happening at ITEXPO. Follow us on Twitter.

Jayashree Adkoli is a contributing editor for TMCnet. To read more of Jayashree’s articles, please visit her columnist page.

Edited by Jennifer Russell

Middle-of-run Circuit

By admin, October 15, 2011 10:19 am

What Is A Furnace Switch

By admin, September 14, 2011 8:55 am


Change a Single Pole Switch

By admin, September 8, 2011 10:35 pm

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Three-way Switches

By admin, September 8, 2011 5:31 pm

Although we’ve all heard the term three-way switches, what do we really know about the? OK, they’re switches that turn lights on and off, that’s obvious. But what makes them so special? Does three-way mean they can be installed three different ways? Funny, but no. Three-way switches are specially designed to work in pairs and often in combination with four-way switches to control lighting from more than one location.

Terminals on Three-way Switches

Three-way switches come equipped with four terminal screws for connecting wires. The green terminal screw is used to connect the ground wire. This terminal screw has either a green or bare copper wire connected to it.

As you look over the three-way switch you’ll notice two brass-colored terminal screws. These are used to connect common wires between the two three-way switches. These are called traveler connections. Basically, if a black wire is hooked on one terminal and a red wire is hooked on the other, the other three-way switch would be wired exactly the same way. Depending on the switch position, one of these two wires will always be “hot” when power is “on” to the circuit.

The last terminal screw is a darker-colored screw. This is the common connection of the switch. Its purpose is to either be the feed source for the circuit or the switch-leg for the feed to a light fixture. As a feeder, the power come in through this connection and, depending on the position of the switch, the power goes out to the other three-way switch through one of the switch-leg (travelers) connections. On the other end, at switch number two, the feed come in through one of the traveler connections and out through the common connection. at this point, the common connection connects to the light fixture feed.

Three-way Switch Blunders

One of the most common problems with three-way switches is improper wiring. It’s very easy to mix up three-way switch wiring when replacing a three-way switch. The most important thing you can do is to take time to mark the wires before you remove any wires from the old switch, The wire connected to the common connection is the most important to mark. It must always connect to the darkest-colored terminal screw. By placing a colored piece of tape or label on the wire, it will be easy to find when you connect the new switch

Another great idea is to only remove one wire at a time when replacing switches. That way, when you remove a wire from one switch, you can attach it to the new switch. By doing it one switch at a time, you’ll be sure to properly connect the switch.

Making a Secure Connection

Three-way switches have different methods of connections depending on what brand you may use. They all have screws on the side, but some come with holes or slots to slide the wire into the switch. Still others come with a quick-mount, spring-loaded slot that holds the wire in place. It basically has two copper strips inside that are bent at an angle to allow the wire to go in, but not to come back out. Although this may be the quickest way to connect a switch, it is not recommended. Personally, I don’t feel this is a solid connection. By screwing the wires down, you’ll be sure to have a tight, safe, and secure connection.

Three-way Switch Troubles

Sometimes three-way switches go on the fritz. This can be caused by loose wire connections and faulty switches. By turning off the power to the circuit and removing the switches, you can tighten the screw terminal connections. Check the neutral connections and other connections made with wire nuts, or dare I say it, electrical tape. If you have one of these connections, replace it with a wire nut.

You may notice that the switch makes a sizzling or popping sound when you turn the switch on or when it is on. This means that the switch contacts are getting bad and aren’t making good contact. This switch should be changed immediately to avoid bigger electrical problems. By inspecting your switches periodically, you’ll ensure safe and effective electrical connections.

Want to learn more about switches? The following articles will help guide you. Select one below to continue learning about switches.

Rotary Switches
Learn what a rotary dimmer switch is and how it can benefit lighting in your home.

How to Change a Single-pole Switch
Find out how to change a single-pole switch with this step-by-step tutorial.

Anatomy of a Three-way Switch
Learn what a three-way switch is made of, how they work, and how they are connected.

Common Household Switches

By admin, September 8, 2011 10:02 am

As you walk into your home, the convenience of switches light the rooms of your home. They complete the circuit to your light fixtures when you turn the switch on to light the light and they break the circuit when you turn off the switch to turn the light off.

Single-pole switches are the most basic switches. They simply turn a light on and off. They come in a variety of colors and are rated for 15 and 20 amps.

Three-way switches control lights from two different locations. By adding a four-way switch between them, you can control lighting from three locations. Common uses for three-way switches are hallways, stairwells, or large rooms like living rooms with more than one doorway in them.

Dimmers switches control a lights brightness or intensity. These switches use rheostats to brighten or dim the lights and are a glorified single-pole switch with options. Dimmer switches often replace single-pole switches in homes. These switches work just fine with incandescent lighting, but specialized dimmer switches are required for ceiling fans and fluorescent lights.


Single-pole Switches A single-pole switch turns a light on and off from one location. The switch has two brass terminals for the “hot” wire connections and a green screw for the ground connection. The toggle handle on the switch is labeled on and off.

Three-way Switch A three-way switch has two brass screws, a darker colored screw and a green screw. The brass screw are the traveler wire connections. The darker colored screw is for either the “hot” wire or the switch leg. The green screw is for the ground connection. Unlike the single-pole switch, the three-way switch doesn’t have the toggle handle switched. That’s because one position doesn’t mean that is necessarily on or off. It always depends on the position of the other switch. Learn more about three-way switches.
Rotary Dimmer Switch A rotary dimmer switch is a switch with a rheostat that is used to dim the lights via the switch. Some rotary dimmer switches turn off and others have to have the knob pressed in to shut them off. By turning the knob to the left, the lights will get dimmer. Turning the knob to the right will make them brighter. This is a great switch if you’re using accent lighting. Learn more about rotary dimmer switches.