Further Understanding Cable Fault Location

Our human are living in the environment that always be surrounded by light and electicity. Imagine a day when there is no electricity at home, the first idea come to us is there must be a fault need to be fixed. You should not only need to known what a cable fault is but also what kind of instruments needed to get you out of the bad situation. This article will give a brief introduction about cable fault location as well as the working process of a typical cable fault locator.
A cable consists of multiple wires or electric conductors that are held together with a covering. The cables are frequently used for the distribution of the electrical energy. Although they are most highly developed, there are still malfunction in the cable system. Cable fault location is such process of locating periodic faults, such as insulation faults in underground cables, and is an application of electrical measurement systems.

Cable Fault Location is the process of locating the short circuit faults, cable cuts, resistive faults, intermittent faults, and sheath faults. Power cable fault locator is designed to locate cable faults, pinpointing the fault location, route tracing, cable identification, voltage withstand test and cable information managementCable faults are damage to cables which effect a resistance in the cable. If allowed to persist, this can lead to a voltage breakdown. There are different types of cable faults, which must first be classified before they can be located.
Contact fault: There are two kinds of contact fault, one is the contact between conductor and screen will generating a varying resistance, the other is the contact between multiple conductors will also generate a varying resistance.
Sheath faults: Sheath faults refers to the damage of the cable sheath which allows the surroundings contact with the cable screen.
Moisture caused faults: Water penetrates into the cable sheath and contacts the conductors. Impedance changes at the fault location make measuring more difficult. The resistance usually lies in the low-ohmic range.
Voltage Disruptions: Voltage disruption is caused by the combination of series and parallel resistances, usually in the form of a wire break.
All of the fault listed above will either cause the breakout of the electric or a electric exceed. As we known each cable has a limit of power supply. When this limited exceeds, or the wires becomes weak, there will be a short circuit causing a spark and then a minor or major explosion. To fix this issue, a cable fault locator is needed. To locate a fault in the cable, the cable must first be tested for faults. During the cable testing, flash-overs are generated at the weak points in the cable, the cable will be fixed either by providing new wiring, or increasing the wire strength. During the working process of the cable fault locator, the cable fault finder receives signals from the locator and the arrow on the instruments points to the position where the digging and maintenance required to be done.
FiberStore now offers a full series of power cable fault locators that will automatically detect the cable fault, which will greatly reduce the time and training required to find these problems. Our cable fault location instruments systems are applicable to all types of cable ranging from 1 kV to 500 kV and all types of cable faults such as short circuit faults, cable cuts, resistive faults, intermittent faults, sheath breaking, water trees, partial discharges. Know more informations of exporters and suppliers of electric or fiber optic tester.

Significant Guidance on the Cisco SFP Transceiver

Cisco System, Inc. established in 1984, is an international reputable company providing internet solutions, equipment and software products, whose products are mainly used to connect a computer network system, Cisco routers, switches and other equipment carries 80% of global Internet communications, of the new economy in the Silicon Valley legend. Over the past 20 years, Cisco has almost become synonymous with the Internet, network applications, productivity, Cisco have become the market leader in every area of its entry. The company is also specialized in producing transceiver modules include a well advanced and useful type of transceiver namely mini GBIC or SFP module.
SFP is the abbreviation of Small Form Factor Pluggable referring to a compact small and hot-pluggable transceiver. Cisco SFP transceivers are designed to change the series electric signals to the serial optical signals for either telecommunication or data communication fields. The transceiver is usually working with a network device a switch or a router to connect to a copper networking cable or fiber optic. SFP is a recognized industry standard thus is supported by almost every leading vendors such as H3C, HP, Huawei. It is designed to support communication in standards such as Gigabit Ethernet, SONET, Fibre Channel and many others.
The main parameters of the SFP module
Average transmit optical power (TxLOP: Optical Average Power) average transmit optical power refers to the signal logic 1 when the optical power and for 0:00 the arithmetic mean of the optical power. P0 + the P1 PAVG = 2 (dBm)
Consumers light ratio (ER: ExtinctiRatio) signal logic to 1, the optical power and is 0 when the light power size ratio. The calculation formula for: P1ER = 10log P0 (dB) ER extinction ratio, the unit is dB, P1 and P0 represents the logic 1 and 0 when the optical power.
The minimum average light reception sensitivity (Receiver Sensitivity) measure the receiving end of a certain bit error rate (1 × 10exp (-12)) To ensure the desired reception power, in units of dBm. BER is within a longer period of time, after received after the receiving side of the photoelectric conversion error output terminal of the number of symbols with the BER tester gives the ratio of the number of symbols.
Loss indicative signal (LOS Assert) restore instruction (LOS Dessert) receiver output an electric signal, and the signal is lost and the potential level of the adequacy reflects the intensity of the optical signal received by the receiver, to determine by comparing the potential of the preset potentiometer light whether the signal is lost. Potential has a certain effect hysteresis comparator to achieve, usually default electrical signal corresponding to the optical power as an indication, in dBm
Eye mask margin (EMM: Eye Mask Margin) eye opening, refers to the degree of "open" in the best sampling point eye amplitude distortion-free opening of the eye diagram should be 100 [%]. Eye diagram template tolerance eye mask expansion, until the eye diagram of the sampling points into the template of the biggest expansion of the expansion area percentage.
Cisco SFP is flexible in its extensive set of items including Cisco GLC-T, Cisco GLC-SX-MM, Cisco GLC-LH-SM, Cisco CWDM SFP, which can be used with the union of 1000BASE-T, 1000BASE-SX, 1000BASE- LX/LH, 1000BASE-EX, 1000BASE-ZX, or 1000BASE-BX10-D/U in a port-by-port basis.

Cable Ties and Many More Cable Management Tools from FiberStore

Are you still handing wandering on the Internet and search for a best online provider of superior quality cable ties, heat shrink tubes, wiring products, and related accessories? If so, FiberStore.com is a good place you should not miss out. At FiberStore.com, you almost can find everything you need to efficiently and effectively meet the needs of bundling electric cables or wires project no matter for your home, the office, the job site or someplace beyond.
The inventory distributor FiberStore provides cables ties come in a variety of types and sizes, which can fit for your different project. Cable ties is know as wire ties or zip ties, which is mainly used for fastening, binding or organizing fiber optic or electronic cable wire. Our cable ties are usually made of very strong and durable materials, which can be used for many purposes such as identifying and bundling computer cables under the desk to keep them neat, indentifying and bundling home sound or stereo systems, hanging bicycles in garage, organizing tools in the workshops, of course, if you like, you also use the cable wire ties to binding fences or plants for your gardening or decoration purpose.
Regular material that the cable ties use is Velcro or Nylon, through the flowing text, you will know deeper for Velcro cable ties and Nylon cable teis.
A Velcro cable tie is some kind of hook-and-loop fastener, which consists of two lineal fabric ships attaching to the opposing surfaces, one of them is a tiny hooks and the other is a small loops. When the two components are pressed together, the hooks catch in the loops and the two pieces fasten temporarily and hard to be separated. The Velcro cable ties are self-gripping design and if quick tools for fastening and secure wire bundles and harness components. Velcro cable ties are available in different colors including blue, black, gray, red and green. FiberStore Magic Velcro cable ties are in 20 x180, 20 x160mm hook and loop.
FiberStore Nylon cable ties is ideal for outdoor use because of its high strength and a wide temperature range. Nylon is one of the most commonly used synthetic polymers that primary invited for industrial applications. The Nylon cable ties made of Polyamide 6.6, and must meet the UL 94 V-2 flammability classification and military specification MS 336. FiberStore offers standard, 4x150MM, 4x200MM, 5x200MM Nylon cable ties series with 100 or 500pcs/pack, all of which are useable up to 250° F.
Besides, we also offers Nelco Products also carries military spec cable ties. Nelco Products carries cable tie installation products and printers that fit our label ready cable ties. In a short, FiberStore is one of the best selections of versatile, durable, high reliable cable ties and accessories. Our inventory includes releasable cable ties, metal cable ties, reusable cable ties, heavy duty cable ties, and nylon cable ties. Whether you are independent contractor, a company employee, or a do-it-yourself type of person, you will benefit from our inventory of cable ties and accessaries. FiberStore also offers a variety of cable installation tools, fiber splice sleeve, and wire tie tools in our convenient online store. We can also customize your cable ties with you company name, logo or barcode. For more information, you can visit FiberStore official website online.

What is Network Cable Tester

Network Tester is often also called professional network analyzer or network detector can detect the OSI model defined physical layer, data link layer, network layer’s operating conditions of portable, intelligent visual inspection equipment. It is primarily for LAN fault detection, maintenance, and integrated wiring construction, network testers features include the physical layer, data link layer and network layer.

Network testers can greatly reduce the time the network administrators troubleshooting network problems. With the popularity of the network and more complex, a reasonable set up and normal operation of the network becomes extremely important. To keep the normal operation of the network, two jobs should be done: First, network construction quality directly affect the subsequent use of the network, and the quality of construction can not be ignored and must be strict requirements, certified check, take preventive measures. Second, it is critical that to investigating and eliminating a network failure, which directly impact the efficiency of the operation, we must pursuit a high efficiency. The network detection aids in network construction and network maintenance work becomes increasingly important.

Classification
According to the transmission medium, the network tester can be divided into two types which is wireless network tester and cable network tester.

Wireless network tester: wireless network tester is mainly for router and AP detection, which can invest the terminal and the signal strength that connected to the wireless network, thus to effectively manage the notes in the network, and enhance network security. Kind of product technology is not very mature, with the promotion of wireless network, wireless network testers will become an important detection tool.

Network cable tester: Common transmission medium of cable network testers including twisted pair cable, optical fiber and coaxial cable. Coaxial cable has rarely used, what is commonly used are twisted pair cable, the fiber optic network is the feature trend. In the currently market, there are two kinds of cable network testers to fit for different transmission medium, fiber optic network cable tester and twisted-pair network tester. Since fiber optic network tester is not commonly used, so the most network tester refers to twisted pair network tester.

According the functions, network testers can be divided into cable tester, multifunction network tester and network performance tester.
Cable tester: Cable tester is for the detection of network media, including cable lengths, crosstalk attenuation, signal-to-noise ratio, circuit diagram and cable specifications parameters commonly used in integrated wiring construction.

Multifunction Network Tester: Multifunction Network Tester usually refers to a variety of tests to integrate the functions of network testing equipment, such as integrated link identification, cable diagnostic scan line order, topology monitoring, Ping function to find port, POE detection. Because of the full function of such equipments, they are also capable of network maintenance, network construction and cable diagnostics.
Network performance tester: Network performance testing equipment is a high-end device, the main features include network traffic testing, data interception, IP query, traffic analysis, commonly used in the field of large-scale network security industry.

In a word, the cable tester or LAN cable tester is widely used in the construction of communication cable, power cable construction, the construction pipeline construction, communication cable to the power supply circuit, and Maintenance of electric lines, an indispensable tool for first-line construction and maintenance personnel.

How to Choose A Network Interface Card

Network interface card the full name of NIC, which can be also called network card, network adapter, the basic component of the LAN networks to connect the computer and the network hardware equipments. Whether it is twisted pair connection, coaxial cable, or fiber connections, it must be with the help of the network card to implement the data communication. The connection type of the network interface card can be either optical or electrical. Optical interface are generally via the fiber optic cable for data transmission, transceiver module for which is usually GBIC or SFP module, with LC, MTRJ, or SC connector.

Fiber Ethernet card is mainly used in fiber optic Ethernet communications technology. The fiber optic Ethernet network card can provide fast and reliable Ethernet connection for users computer, especially suitable for the transmission distance exceed the Cat5 cable access distance (100m). It can completely replace the current commonly used network construction that using RJ45 connector Ethernet card external connect the photoelectric converter. The network interface card provides a reliable fiber-to-the-home and fiber to the desktop solution. Users can choose the its parameters according to the application occasion including its connector types, single or multi-mode fibers, working distance, etc.

Correct choosing, connecting, and set up the network interface card is essential for a good network connection. Then let’s discuss what should be taken into considerations when choosing the right fiber optic network card.

First, you should know what type of network you are using. What are popular now are Ethernet, Token Ring, FDDI network and more. Select the corresponding card for your network type.

Second, take the transmission rate into consideration. Based on bandwidth requirements of server or workstation combined with the physical transmission medium that provided maximum transfer rate to select the transmission rate of the network card. Take Ethernet for example, the speed option are variety including 10Mbps, 10/100Mbps, 1000Mbps, even 10Gbps. It is not true that the higher the more appropriate. For example, it is a waste to configure a computer that linked with the 100M twisted pair with a 1000M card, which can be at most achieve a transmission rate of only 100M.

Third, pay attention to the bus type. Servers and workstations typically use the PCI, PCI-X or PCI-E bus intelligent card, the PC is basically no longer supported by the ISA connector, so when you purchase network card for you PC, do not buy the outdated ISA network card, what you should choose is the PCI-X and PCI-E or PCI card

Fourth, you should also consider the connector type that the NIC supports. The network card finally needs to be connected with the network, so it must be with a fiber optic connector to link with other computer network equipment. Different network interface is suitable for different network types. Common used connector types are Ethernet RJ45 connector, LC, FC, SC connector.

Finally, you should take the cost and brand into consideration, because different rates, different brands of the NIC card, the prices of them are surely greatly differ from each other. If you want to know the detail information of the PCI Card, you can go to visit FiberStore official website.

Fiber Optic Splicing Application and Process

When we want two fibers or fiber optic cables joint together, there are two method come to our head, installing a fiber optic connectors at the end of the optical fibers, or splicing the two optical fibers. Fiber optic cable splicing is a method that creates a permanent joint for two fibers, while fiber connector installation is used for temporary connections. There are two options for fiber optic splicing: Fiber optic cable fusion splicing and mechanical splicing. Both methods provide much lower insert loss than fiber optic connectors.

Common application for splicing is jointing cables in long outside plant cable runs where the length of the run requires more than one cable. Splicing is generally used to terminate singlemode fibers by splicing preterminated pigtails onto each fiber. It can be also used to mix numbers of different types of fiber cables like connecting a 48 fiber cables to six 8 fiber cables going to different places.

Fusion splicing provides a maximum insertion loss of 0.1 which is less than 0.5dB of mechanical splicing. Fusion splicer are available in two types that splice a single fiber or a ribbon of 12 fibers at one time. Almost all singlemode splices are fusion spliced. Mechanical splicing is most used for temporary restoration and for multimode splicing. Fusion splices are so good today that splice points may not be detectable in OTDR traces.

Fusion Splicing Process
Fusion splices are made by welding two fibers together by an electric arc of the fusion splicing machine. It can be not done in the enclosed space for safety reasons. It is suggested to done the job above the ground in a truck or trailer for a clean environment for splicing.

Fusion splicing needs the help of a special equipments which is fusion splicer to perform the splicing process. Main steps are aligning the two fibers precisely and generate a small electric arc to melt the fibers and weld them together.Splicing machine can do one fiber at a time while mass fusion splicer can do all 12 fibers in a ribbon at once.

Preparing fibers: The first step for fusion splicing is to strip, clean & cleave the fibers to be spliced. Stripping the primary buffer coating to expose the proper length of bare fiber with the fiber stripper. Clean the fiber with appropriate wipes, what you need is the fiber optic cleaning kit, Cleave the fiber using the directions appropriate to the fiber cleaver being used. Place each fiber into the guides in the fusion splicing machine and clamp it in place.

Running the splicer program: Choose the proper program according to the fiber type being spliced. The splicer would show the fibers being spliced on a video screen. The fiber ends will be inspected for proper cleavers and bad ones will be rejected for a second time cleaving. The fibers will be moved into position, prefused to remove any dirt on the fiber ends and preheat the fibers for splicing. The fibers will be aligned using the core alignment method used on that splicer. Then the fibers will be fused by an automatic arc cycle that heats them in an electric arc and feeds the
fibers together at a controlled rate.

Ribbon fusion splicing: Each ribbon is stripped, cleaved and spliced as a unit. Special tools are needed to strip the fiber ribbon, usually heating it first, then cleave all fibers at once. Many tools place the ribbon in a carrier that supports and aligns it through stripping, cleaving and splicing. Consult both cable and splicer manufacturers to ensure you have the proper directions.

Fusion splicing pigtail is another typical application for fiber optic splicing. By this method, a fiber optic patch cord is cut into two pigtails with connectors attached. The fibers are cleaved and welded together with a fusion splicer, which is considered to be the fastest and highest-quality method of fiber connector installation.

What is a Punch Down Tool

A punch down tool is commonly used for the termination works in the copper network. Copper networks are most built by the twisted-pair cables like the Cat5, Cat5e, Cat6 and some newer standard Ethernet cables. These Ethernet cables usually need to be terminated with the keystone jacks, cross-connect blocks or patch panels. The punch down tools can be also called a punchdown tool or a Krone punch down tool, which is a small hand tool used by the telecommunication and network technicians. It is used to terminate the Ethernet cables by inserting the cables wires into the insulation-displacement connectors (IDC) on the punch down blocks, patch panels, keystone modules, and surface mount of boxes.

IDC is a little knife blade with a V-shaped gap or slit between them. In the working process, the punch down tool punches down and force the Ethernet twisted-pair cable conductor into the V-shaped gap. Then the IDC connector makes contact by cutting through, or displacing, the insulations around a single conductor inside a twisted-pair cable.

Most punch down tools are of the impact type, consisting of a handle, an internal spring mechanism, and a removable slotted blade. A punch-down tool is really just a handle with a special blade that fits a particular IDC.

To accommodate different connector types, there are punch down tools with 66, 110, BIX and krone blades. Different blades are used depending on whether you are terminating 110 blocks or 66-blocks. The 66-block is mostly used in cross-connect blocks for voice cross-connects. The 110-block is now generic in usage and is a newer design by AT&T. 110 Block is most used for data network, although it is not absolutely so. Though the blades for each type are pretty different, most punch down tools on the market today can accept both types.

Substitute for a Punch Down Tool
Screwdrivers
The process of punching down a wire properly takes a considerable amount of force. You could just use a small flat-blade screwdriver as a substitute for a punch down tool. It is vital that you should take care no to break the thin wire before it makes contact with the desired slot.

Needle-nose pliers
Needle-nose pliers are also a viable option to replace a punch-down tool for occasional use. If you can find a small electronics set of pliers, it would often include a thin, bent-nose tool that aids in reaching behind challenging angles to push the wire between its slots.

Spring-loaded Nail Sets
A spring-loaded nail set is a standard nail set that incorporates a spring much like a small door spring to allow it to be snapped to generate force in a tight spot. In a time of need, you can grind it down to a flat blade than you can apply a similar force to a jack.

Tool-less Jacks
You can purchase slightly more expensive Ethernet jacks at any home store which utilize a tool-less design. In this design, the eight wires of an Ethernet cable are "grabbed" by a jaw-like interface and snapped and locked shut.

To do to the punching down the with the substitute above can be a good choice when you don't have a punchdown tool on you hand. Buy it may be hard for an unpracticed man to control the force to the wires with the substitutes. By using the punch down tool helps you in applying the right amount of force in the right direction and assures a firm connection. FiberStore supply 110 punch down tool, Krone punch down tool and many other fiber optic tester and tools with competitive price.