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目前显示的是 十一月, 2017的博文

CRIMINALS ATTACKING FIBER OPTIC CABLES

There are criminals out there; we suppose that terrorists may be a better choice of words, as they attack fiber optic cables in California. Just recently, and for the 11th time within a year, a purposefully severed  fiber optic cable  was found in the San Francisco Bay Area, according to this article in Theblaze.com.   This is a serious crime or a, as Richard Doherty, research director of The Envisoneering Group, puts it, “terrible social crime that affects thousands and millions of people.” The FBI is currently investigating the rash of fiber optic cutting in California and is determining whether they are connected.   When fiber optics are disrupted or cut altogether, it affects more than Internet, it affects the very way we communicate, so that puts hospitals and schools at risk, and that might result in the loss of lives. It is called the World Wide Web for a reason – we’re all caught in it and it’s near impossible to get off the grid nowadays.   By damaging a cable, it

MICROSOFT AND FACEBOOK TO LAY TRANSATLANTIC FIBER OPTIC LINE

The world’s biggest tech companies move a staggering amount of data across the Internet every day. Take Facebook, for example – a company whose 1.65 billion registered users are constantly chatting, uploading photos, and now even streaming live videos to people all across the globe. It takes some serious infrastructure to support that data, and until recently telecom companies were the sole proprietors of the transoceanic fiber optics that make it all possible.   Microsoft and Facebook to Lay Transatlantic  Fiber Optic  LineNow, however, companies like Google and Amazon are beginning to stake their own claims on the backbone of the Internet. Rather than leasing bandwidth from telecom companies, these industry giants are investing hundreds of millions of dollars to purchase and install their very own transatlantic fiber optic cables. It’s an expensive proposition, but one that’s like to have a big payoff in the long run.   Recently, Facebook and Microsoft announced that they’ll

A NEW, FASTER TRANSPACIFIC FIBER OPTIC CABLE GOES ONLINE

Thanks to a joint partnership between Google and a number of telecom companies in East Asia, the fastest transpacific broadband cable in the world is now online. Aptly named FASTER, the cable stretches 5,600 miles from Oregon to two points in Japan. The cable is expected to offer transfer speeds as fast as 60 terabits per second – about ten million times faster than an average cable modem. Google has reserved exclusive access to a pair of optical transmission strands that are expected to provide the company with transfer speeds up to 10 terabits per second.   With FASTER complete, Google now owns a total of four undersea cables that cross the Atlantic and Pacific oceans. With the global demand for bandwidth continuing to increase, we’re likely to see more private enterprises investing in their own undersea cables in the future as well.Google’s interest in the FASTER project was twofold. To begin with, it will allow the company to expand its new Google Cloud Platform in the East As

FAST FACTS ABOUT UNDERSEA FIBER OPTICS

It may seem like technology today is especially reliant on wireless data transmission – more and more locations offer free Wi-Fi to patrons and guests, and unlike the days of dial-up, your phone and computer don’t need to be physically connected to something in order to transmit data. Well, while it is true that we’re a world obsessed with wireless content, there’s simply no way the internet could function without the network of ocean-crossing cables that were laid many years ago to connect the continents.   PHYSICAL CABLE LINKS Fiber optic cables  on the ocean floor carry 99 percent of all transoceanic digital communication, which includes phone calls, websites and emails. Without these cables, you would have a hard time FaceTiming with your colleagues in London or emailing family while vacationing in Ireland. Relying on satellites to transmit data Fast Facts About Undersea Fiber Opticswould make communication possible, but it would be incredibly slow compared to the speed that

A NEW, FASTER TRANSPACIFIC FIBER OPTIC CABLE GOES ONLINE

Thanks to a joint partnership between Google and a number of telecom companies in East Asia, the fastest transpacific broadband cable in the world is now online. Aptly named FASTER, the cable stretches 5,600 miles from Oregon to two points in Japan. The cable is expected to offer transfer speeds as fast as 60 terabits per second – about ten million times faster than an average cable modem. Google has reserved exclusive access to a pair of optical transmission strands that are expected to provide the company with transfer speeds up to 10 terabits per second.   With FASTER complete, Google now owns a total of four undersea cables that cross the Atlantic and Pacific oceans. With the global demand for bandwidth continuing to increase, we’re likely to see more private enterprises investing in their own undersea cables in the future as well.Google’s interest in the FASTER project was twofold. To begin with, it will allow the company to expand its new Google Cloud Platform in the East As

CALIFORNIA GAS PIPELINES WILL GET FIBER OPTIC MONITORS

In addition to bringing the Internet to people all over the world, optical signals have a host of other lesser-known uses as well. Recently, the Southern California Gas Company (SoCalGas) announced that it will use optical fibers to help monitor and maintain the subterranean gas lines that carry fuel throughout the state. The first phase of the  fiber optic  monitoring system will be installed on a seven-mile stretch of pipeline north of Los Angeles later this year.   The optical fibers will be buried 36 inches underground, and about 12 inches above the pipelines they’ll monitor. They will be connected to a remote station that will provide technicians with early warning alerts at the first sign of trouble. By interpreting changes in the optical signal, the monitoring system is able to identify and distinguish between different types of damage such as a leak or accidental dig-in by a third party contractor. It’s able to pinpoint the location of the damage to within 20 feet.   “

COMMON USES FOR FIBER OPTIC CABLES

Fiber optic cables  have been around for years now, but over the last decade or two, companies have come up with all sorts of ways to put them to good use. Fiber optic cables contain a few thousand optical fibers inside of them, and they are used to transmit data by utilizing light. They have changed the way that information is sent all over the world, and in the coming years, they are going to be used even more than they already are today. Let’s take a look at some of the most common uses for fibers optic cables.   Internet   Because fiber optic cables are able to take incredibly large amounts of data and move them quickly, they are primarily used by those who use the internet. Data used to be moved around through the use of copper wires, but those wires weren’t equipped to move the data as quickly as fiber optic cables can do it. So there are more and more places that are turning to fiber optic cables for their internet needs.   Telephone   People from all over the g

THE DIFFERENCES BETWEEN CABLE AND FIBER OPTIC BROADBAND

When it comes to broadband internet connections, most people value speed. They want to be able to access the internet and transmit data as quickly as possible. Moreover, in order to do this, people typically rely on either cable or fiber optic broadband service. However, what many people don’t realize is that there are notable differences between the two:   CABLE VS.  FIBER OPTIC BROADBAND Fiber optic broadband relies on fiber optic cables to move data around. Fiber optics cables are known for being capable of moving information very quickly, and they are much more reliable than other types of cables. Cable broadband, despite its name, also relies on fiber optic cables to move data around. This can be a little bit confusing for some people to understand, but cable broadband is quite similar to fiber optic broadband in this way.   What sets the two broadband services apart is how they actually connect to your home. There are some fiber optic broadband providers that do it wit

WHY IT PROFESSIONALS PREFER FIBER OPTICS

More and more IT professionals are choosing to install fiber optic cables over the copper cables that have traditionally been used to create networks. Why is that? Well, for one, fiber optic cables have proven to transmit data substantially faster than copper cables. Fiber optic cables use light to move data around, and that makes them quicker. But that’s not the only reason why IT professionals are choosing fiber optic cables. Here are several other reasons.   FIBER OPTIC CABLES DON’T LOSE THEIR SIGNAL STRENGTH AS QUICKLY AS COPPER CABLES. When copper cables are forced to transmit data over a long distance, they end up losing a lot of their signal strength. IT professionals refer to this as low attenuation, and it can obviously be problematic for companies that need cables capable of carrying data over longer distances. Data doesn’t break down in fiber optic cables like it does in copper cables, which, outside of speed, is one of the biggest benefits of using them.   FIBER

Fiber Optic Connector Types for data center

LC and MPO Fiber Optic connectors were defined for data center applications in accordance with ISO/IEC 24764, EN 50173-5 and TIA-942 standards for fiber optic cabling systems.   MPO Connector  (IEC 61754-7) MPO (multipath push-on) is based on a plastic ferrule that provides the ability to house up to 24 fibers in a single connector. Connectors with up to 72 fibers are already in development by this time. This connector stands out because of its compact design and easy operation, but brings disadvantages in optical performance and reliability.   This connector type is of crucial importance because of its increased packing density and ability to migrate to 40/100 Gigabit Ethernet.optical-fiber-mpo-connector_400 LC Connector (IEC 61754-20) This connector is part of a new generation of compact connectors. It was developed by Lucent (LC stands for Lucent Connector). Its design is based on a 1.25 mm-diameter ferrule. Its duplex adapter matches the size of an SC adapter. As a r

Data Center Design for 40G/100G Network

1G and 10G data rates are not adequate to meet the future needs of high-bandwidth appli- cations. The requirement for higher data rates is being driven by many factors. Switching and routing, virtualization, convergence and high-performance computing environments are examples of where these higher network speeds will be required within the data center environment. Additionally, Internet exchanges and service provider peering points and high-bandwidth applications, such as video-on-demand will drive the need for a migration from  10G to 40/100G interfaces . Bandwidth OM3 and  OM4 fibers  were selected as the only multimode fiber for 40/100G consideration. The fibers are optimized for 850 nm transmission and have a minimum 2000 MHz∙km and 4700 MHz∙km effective modal bandwidth (EMB), respectively. Two EMB measurement techniques are utilized today for the bandwidth measurement. The minimum effective modal bandwidth calculated (EMBc) method offers the most reliable and precise measurem

DCD Chaochai CY4102EZL engine piston kit

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DCD Chaochai CY4102EZL engine piston kit JULY main products: DCEC DONGFNEG CUMMINS diesel engine parts ---4BT 6BT 6CT ISBE ISDE ISLE L   FOTON CUMMINS engine part --- ISF2.8 ISF3.8 CCEC CHONGQING CUMMINS engine parts ---NTA KTTA NT855 M11 QSB QSL QSZ DONGFENG truck parts DFM:  L375 DFL4251 DFL3251 DFL4240 etc. heavy truck parts DFAC : DFA1069 CAPTAIN DUOLIKA JINBA XIAOBAWANG KANGBA Dongfeng Star etc. light truck parts DFSK : C37 V27 V29 K17 K07 K01 etc.mini-bus parts DCD DONGFENG CHAOCHAI diesel engine parts CYQD32 CY4102BZL CY6102 Y102BG CY4D Diesel Engine Part  common rail injector nozzle, Bosch injectors ,sensors, Fleetgaurd filters, Holset turbochargers,   etc.

Cummins ISF2.8 Hydraulic Pump 5286672

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Cummins ISF2.8  Hydraulic Pump  5286672   Part Number: 5286672 Part Name:Hydraulic Pump Model:Cummins ISF2.8 Description JULY main products: DCEC DONGFNEG CUMMINS diesel engine parts ---4BT 6BT 6CT ISBE ISDE ISLE L FOTON CUMMINS engine part --- ISF2.8 ISF3.8 CCEC CHONGQING CUMMINS engine parts ---NTA KTTA NT855 M11 QSB QSL QSZ DONGFENG truck parts DFM:  L375 DFL4251 DFL3251 DFL4240 etc. heavy truck parts DFAC : DFA1069 CAPTAIN DUOLIKA JINBA XIAOBAWANG KANGBA Dongfeng Star etc. light truck parts DFSK : C37 V27 V29 K17 K07 K01 etc.mini-bus parts DCD DONGFENG CHAOCHAI diesel engine parts CYQD32 CY4102BZL CY6102 Y102BG CY4D Diesel Engine Part common rail injector nozzle , BOSCH injectors ,sensors,   FLEETGUARD filters, HOLSET turbochargers,   etc.

Cummins ISF3.8 air compressor 4932265 5282444

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How to save money on your homeowners insurance

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How to save money on your homeowners insurance The price you pay for your  homeowners insurance  can vary by hundreds of dollars, depending on the size of your house and your insurance company. From shopping around to making home improvements, here are some ways to save money while you adequately protect your home and assets. Don’t skimp—but do shop around Having homeowners insurance is undoubtedly an expense—but it is also your protection against potential disaster and financial ruin. Homeowners policy prices vary from company to company, so do some comparison shopping and get the best deal you can. Ask friends and relatives for recommendations for insurers and then do your due diligence. Contact the state insurance department to find out whether they make available consumer complaint ratios by company. If they do, check into the insurers you’re considering doing business with. Check the financial health of prospective insurance companies by using ratings from independent rat

8 smart steps for buying life insurance

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8 smart steps for buying life insurance 添加图片说明 Life insurance can form a vital part of your family’s financial stability and well-being but, if you’re like most people, you may find the thought of shopping for the right type of coverage a little daunting. Fortunately, these eight simple steps can guide you along the way. 1. Determine whether you actually need life insurance Most people do, but not everyone. If no one depends on you financially, if you have no debt and would leave an estate with enough cash to pay its own taxes and expenses, you probably don’t need life insurance. If you do not meet these criteria, you probably will need individual life insurance. 2. Calculate how much life insurance you need There are two important questions to ask: What financial resources will be available to survivors after your death? For simplicity, consider three categories of resources: (1) Social security and other retirement-related survivor benefits; (2) group life insurance; a

Les principaux connecteurs

Le connecteur SC est le plus employé actuellement. On le retrouve sur un grand nombre d’équipements actifs quelle que soit l’application (Ethernet, Fiberchannel…). Il présente de nombreux avantages par rapport aux connecteurs ST : dépassement moindre de l’embout donc pas de risque de pollution, conception “pull-proof” donc pas de risque de déconnexion lors d’une traction sur le câble, section rectangulaire pour une meilleure prise en main et un guidage amélioré à l’intérieur du raccord. Il répond à la norme CEI 60874-14 et porte la dénomination SC (“Subscriber connector”).   Le connecteur bi-fibre LC dispose d’embouts de céramique de 1,25 mm et de corps plastique. Les fibres sont espacées de 6,25 mm. Développé par AVAYA, il permet de réduire de moitié la taille des connecteurs existants, tout en conservant des technologies éprouvées. Il répond à la norme CEI 61754-20 et porte la dénomination LC.   MPO signifie « Multiple-fiber Push On/Push Off ». C’est une solution permettan

La Solution FTTx / FTTh

FTTh est l’acronyme de Fiber To The Home qui signifie « fibre optique jusqu’à la maison » en anglais. La solution FTTx rassemble toutes les solutions FTTh, FTTo (office), FTTd (desk)… Jusqu’alors utilisée principalement dans les réseaux de longues distances (transport et collecte) et réservée aux entreprises pour la partie desserte, la fibre optique s’approche désormais progressivement de l’usager final. Les réseaux de dessertes d’abonnés (ou boucle locale) actuels sont communément constitués de câbles de cuivre ou d’un système WIFI. Ces solutions, moins coûteuses que la fibre sont néanmoins beaucoup plus limitées en termes de performances et de distances couvertes. Réseaux FTTh : quels avantages pour l’abonné ? Les abonnés (particuliers, professionnels ou acteurs publics) ont besoin de nos jours de débits de plus en plus élevés afin de pouvoir supporter l’utilisation de la vidéo haute définition, le partage de fichiers volumineux, le cloud computing, les systèmes VOIP et bien plus

Introduction à la fibre optique

Une fibre optique est un fil en verre ou en plastique très fin qui a la propriété d’être un conducteur de lumière et sert dans la transmission de données par la lumière. Elle offre un débit d’information nettement supérieur à celui des câbles coaxiaux et peut servir de support à un réseau « large bande » par lequel transitent aussi bien la télévision, le téléphone, la visioconférence ou les données informatiques. Le principe de la fibre optique a été développé au cours des années 1970 dans les laboratoires de l’entreprise américaine Corning Glass Works (actuelle Corning Incorporated). Entourée d’une gaine protectrice, la fibre optique peut être utilisée pour conduire de la lumière entre deux lieux distants de plusieurs centaines, voire milliers, de kilomètres. Le signal lumineux codé par une variation d’intensité est capable de transmettre une grande quantité d’information. En permettant les communications à très longue distance et à des débits jusqu’alors impossibles, les fibres op