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1. FTTH Fiber Optic Cable   FTTH (Fiber To The Home), as its name suggests it is a fiber optic directly to the home. Specifically, FTTH refers to the optical network unit (ONU) mounted on home users or business users, is the optical access network application type of closest to users in optical access series except FTTD(fiber to the desktop).   There are 5 main advantages of FTTH:   First, it is a passive network, from the end to the user, the intermediate can be basically passive;   Second, the bandwidth is relatively wide, long distance fits the massive use of operators;   Third, because it is carried business in the fiber, and there is no problem;   Fourth, because of its relatively wide bandwidth, supported protocol is more flexible;   Fifth, with the development of technology, including point-to-point, 1.25G and FTTH have established relatively perfect function   2.  Indoor Fiber Optic Cable   In...

Fiber optic cable  provides protection for the fibers from the environment encountered in an installation. Outdoor Fiber Cable is designed strong to protect the fibers to operate safely in complicated outdoor environment, it can be buried directly, pulled in conduit, strung aerially or even placed underwater. While indoor cables don’t have to be that strong.   Outdoor fiber optic cable  is composed of many fibers enclosed in protective coverings and strength members. Common features for fiber optic cable include polarization maintaining, graded index, and metalization. Most outdoor fiber cables are loose buffer design, with the strengthen member in the middle of the whole cable, the loose tubes surround the central strength member. Inside the loose tube there is waterproof gel filled, whole cable materials used and gels inside cable between the different components will help make the whole cable resist of water. Typical outdoor fiber optic cable types are used fo...

http://www.fiber-mart.com/fiber-optic-transceivers-sfp-transceivers-c-1_2.html The tunable DWDM SFP+ is one kind of DWDM SFP+ transceivers. They both can be used in the DWDM system. In the market, tunable DWDM SFP+ transceivers are often between two and four times more expensive than DWDM SFP+ transceivers. Thus, many may think DWDM SFP+ transceivers are enough in the DWDM system and wonder why tunable DWDM SFP+ transceivers are also needed. This post will introduce what is tunable DWDM SFP+ transceiver and explain why they need to be used in DWDM systems in details.   What’s Tunable DWDM SFP+ Transceiver? Tunable SFP+ transceivers are a new technology that is in development for a few more years due to the limiting power specifications of the SFP+. They are only available in DWDM form because the CWDM grid is too wide. So a tunable SFP+ transceiver is also called tunable DWDM SFP+ transceiver.   The tunable DWDM SFP+ transceiver is equipped with an integrated...

Network installers usually come across a situation that device you have in your network does not always fit and work perfectly with the fiber. They plan to make a cable plant based on the multimode cabling, but owing to the link limitation or other reasons, they have to connect multimode equipment with single-mode devices. Is it feasible? Or put it more specifically, can I use the multimode SFP over single-mode fibers or vice versa? This article will give you a detailed illustration about the feasibility of the solutions, and introduce two relevant devices (mode conditioning cable and multimode to single-mode fiber media converter).   Single-mode Fiber Over Multimode SFP —You Can If You Are Lucky   This is the question that has been asked so many time, but no one can give the exact answer—yes or no. Hence, let’s illustrate it in details.   Most people think single-mode and multimode fibers are not interchangable because of the wave length of the laser an...

We’ve all experienced it. The crushing dread of pulling out a cable that you need to not only to find that it is a tangled mess but then discover that it no longer works. This can be the nightmare of anyone that works in an industry that relies on wires and cables to help keep equipment working. No matter if you work in audio, video or simply just want cables that you can rely on in order to enjoy media on your devices, having nicely kept cables not only looks great, but can prolong the life of this much needed resource. One of the big problems with cables is that they can so easily get tangled. Long lengths of wire can be very unwieldy and can be hard to take the time to pack up and secure for future use. Many people who depend on these cords usually do not have the time to devote to standing in one place for long periods of time, wrapping a cord up in their hands. However, the importance of proper cable storage and maintenance should not be underestimated. A properly wrapped cab...

High-speed HDMI cables  can come in a variety of lengths, there’s even a 100 ft HDMI cable out there, and a variety of other options to choose from. They have numerous benefits and the ability to get video resolutions from 480i (standard) all the way to 4k.   There are even HDMI to DVI cables for your computer and other devices, giving you the ability to use High-speed HDMI cables on your monitors and dramatically increase your home or office visual experience. But how do you find the right cable?   Buying the right highspeed HDMI cable isn’t overly complicated or difficult. If it’s from a reputable vendor and the right length for your needs, then it should work just fine. You don’t need to spend a fortune on the cables either, which is why purchasing them from quality suppliers is always a good idea.   HDMI is an audio-video cable that can send the best image quality and the best sound quality over a  single cable . Typically, there are four di...

No matter we are constructing a copper network or a fiber optic network, inline coupler or fiber adapter always plays an important role in terminating or connecting between two lines. Now both copper networking and  fiber optic networking  technologies are being developed to meet the continuously increased bandwidth needs. And there are cases where we have to implement mixing fiber and copper link, such as link aggregation through EtherChannel or IEEE 802.3ad standards. Then how to effectively and efficiently couple both copper keystone jacks and fiber optic connectors on one panel? This post will provide the solution by using the multimedia modular panel, which can manage and organize a wide variety of fiber cabling and copper cabling.   Why Mixed Fiber and Copper Link? At first, let’s have a glance at why there is a need for mixing fiber cables and copper cables. Ten years ago, people were asking if it was possible to have copper and fiber as part of the same p...

Allied Fiber, which plans a nationwide open-access, network-neutral colocation and dark fiber network, says that the first links on its southeastern route are ready for service. The newly opened route segment runs 360 miles from Miami, FL to Jacksonville, FL, and is part of a system expected to reach Atlanta (see “Allied Fiber begins installation of Miami-to-Atlanta fiber-optic network route”). As with the rest of Allied Fiber’s infrastructure, the  fiber cable system  features a unique design that simplifies connection to the network and to colocation facilities (see “Bubble-era ambition in a post-bubble world”). The three major components are high-count dark fiber cable, handholes for lateral splicing, and integrated, network-neutral colocation facilities. The 528-count fiber-optic cable uses Corning’s SMF 28e+ and LEAF fiber. The cable accessible via handholes installed every 5000 feet along the network. The newly opened run connects NAP of the Americas in Miami to 421...

Underground  fiber optic cables  can be accidentally cut. The most typical factor which could cause this accident may be the utilization of backhoe while digging. If it happens to you, you can simply search for backhoe and obtain the cut cables. However, if it is brought on by moles, it will likely be difficult for you to troubleshoot it. You will need some equipment to involve. Here are a few steps suggested for you. The first thing you need to do is to look for the break in your cable. Commonly, the fiber-optic technicians utilize a device which is known as an optical time-domain reflectometer or  OTDR . With the ability to work like radar which sends a light pulse right down to the cable. It will be deflected to your device when it encounters break. It helps technician knows the position of the break. After knowing the location of the break, you should dig up the cable with the break. Then, strip the fiber around 9 feet of the cable using cable rip cord. Peel ...

Fiber Optic Cable  are used in applications where the optical signal is too strong and needs to be reduced. For example, in a multi-wavelength fiber optic system, you need to equalize the optical channel strength so that all the channels have similar power levels. This means to reduce stronger channels’ powers to match lower power channels. The attenuation level is fixed at 5 dB, which means it reduces the optical power by 5dB. This attenuator has a short piece of fiber with metal ion doping that provides the specified attenuation. There are many different mechanisms to reduce the optical power, this picture shows another mechanism used in one type of variable attenuator. Here variable means the attenuation level can be adjusted, for example, it could be from 1 dB up to 20dB. Fiber Optic Cable are usually used in two scenarios. The first case is in fiber optic power level testing. Cable are used to temporarily add a calibrated amount of signal loss in order to test the p...

Ensuring communications remain available is vital during a disaster. If workers in the office lose the internet because of a tornado, the business disruption is a problem, but not nearly as much of an issue as it would be if communications go down completely. Installing cabling architectures that interconnect with telecom infrastructure is a key part of a construction process, and how these systems are deployed can impact communications availability during a disaster. Having alternative network options that can provide emergency communications can also help, ensuring that emergency services can be contacted in the event of a disaster event. Simplex OM2 50/125 Multimode Fiber Optic Patch Cable Installing cables to ensure free movement through a building A poor cabling setup can lead to major problems when disasters strike. Loose wires can clump together, blocking doors, hallways and other areas, preventing people from getting out of a building to escape or into a structure to res...

1000BASE-LX/LH SFP1000BASE-LX LH SFP, one of the commonly used fiber optic transceivers, is now widely used in optical transmission systems. With the development of 40/100G Ethernet , even 400G Ethernet, this kind of transceiver module is nothing new to the module users. However, few people can deliver a clear answer to the question of what “1000BASE-LX / LH” infers. Well, if you know what it means, congratulations! you are the one of the few. You can skip today’s contents or share your experience to us in the comment. Actually, this post is a simple reference source for the beginners in this field or those who are lack of knowledge with fiber optic transceiver but have a strong interest in it. To begin with, I’d like to make a brief introduction of 1000BASE-LX / LH SFP. This kind of SFP is similar with the other SFPs in basic working principle and size. But it is compatible with the IEEE 802.3z 1000BASE-LX standard, operating on standard single-mode fiber-optic link spans of up to...

The Cisco CWDM solutions are built on the Gigabit Interface Converter (GBIC) technology to support the gigabit Ethernet services. The Cisco CWDM GBIC products can be inserted into the Cisco switches and routers. The Cisco DWDM products are based on the wireless fiber media converter. And these Cisco DWDM products support many services such as the gigabit Ethernet, Fibre Channel, OC-x, ESCON/FICON and the DSx service. The Cisco DWDM products also can be connected to the Cisco switches and routers.  If you think that the Cisco products, such as, fiber optic transceivers, are very expensive. You come to the right place. We provide CWDM GBIC transceivers, DWDM GBIC modules, SFP+ modules , X2 modules and other fiber optic modules with the high performance and the lower price. And these products are all compatible with Cisco and other brands’ equipment.

Fiber Optic Transmitters and Receivers (Transceivers)   Fiber optic transmission systems (datalinks) all work similar to the diagram shown above. They consist of a transmitter on one end of a fiber and a receiver on the other end. Most systems operate by transmitting in one direction on one fiber and in the reverse direction on another fiber for full duplex operation.   Most systems use a "transceiver" which includes both transmission and receiver in a single module . The transmitter takes an electrical input and converts it to an optical output from a laser diode or LED. The light from the transmitter is coupled into the fiber with a connector and is transmitted through the fiber optic cable plant. The light from the end of the fiber is coupled to a receiver where a detector converts the light into an electrical signal which is then conditioned properly for use by the receiving equipment.   The sources used for fiber optic transmitters need to meet seve...

Fusion Splicing  is simply joining two optical fibers together by making use of heat. The two optical fibers should be fused in such as way as to allow light to be passed through them without scattering or reflecting light back at the point of the splice. The heat used to fuse the two fibers together is usually in the form of an electric arc, however it can also be achieved using a laser or even gas flame, but these methods are considered dated and inferior . This very simple Fusion Splicing guide should help to explain the process without getting too technical.   What You’ll Need   Fiber Strippers Kevlar Cutter Splice Sleeves Alcohol Wipes Fiber Optic Cleaver Microscope (Not mandatory, but very useful for checking fiber ends) Fusion Splicer   Step 1: Stripping the Fibers It sounds simple enough right? Unfortunately this is not quite as simple as stripping the simple coating of your average house-hold copper cable. In this case you will f...