6 Things You Must Know about Fiber Optic Cable .

Outdoor fiber cables must endure harsh environment factors such as UV radiation from sunlight, storms, snows and 80 mph wind, so outdoor cables must be strong, weatherproof and UV resistant. The outdoor cable should also be able to endure the wild temperature variations both during installation and throughout its life span.


These factors determine the materials used for the cable construction. Various materials are used to suit the installation environment.

Outdoor cable jacket is treated to prevent UV light from penetrating inside the cable and damaging the internal glass fibers. Extra UV protection specification can be specified if needed.

:: Environment requirement on indoor fiber optic cables

Indoor fiber cables should be strong and flexible for easy pulling and installation. They should also possess NEC required fire and smoke ratings. As a industry standard practice, single mode fiber jacket is yellow and multimode fiber jacket is orange.

:: Popular cable materials in fiber optic cable construction

1. PVC (Polyvinyl Chloride)

Features:

1) Good resistance to environmental effects. Some formulations are rated for -55°C to +55°C.
2) Good flame retardant properties. Can be used for both outdoor and indoor fiber optic cables.
3) PVC is less flexible than PE (Polyethylene)

2. PE (Polyethylene)

Features:

1) Popular cable jacket material for outdoor fiber cables
2) Very good moisture and weather resistance properties
3) Very good insulator
4) Can be very stiff in colder temperatures
5) If treated with proper chemicals, PE can be flame retardant

3. Fluoropolymers

Features:

1) Good flame-resistance properties
2) Low smoke properties
3) Good flexibility
4) Most often used for indoor fiber cables

4. Kevlar (Aramid Yarn)

Aramid yarn is the yellow fiber type material found inside cable jacket surrounding the fibers. It can also be used as central strength members.

Features:

1) Aramid yarn is very strong and is used in bundle to protect the fibers
2) Kevlar is a brand of aramid yarn. Kevlar is often used as the central strength member on fiber cables which must withstand high pulling tension during installation
3) When Kevlar is placed surrounding the entire cable interior, it provides additional protection for the fibers from the environment

5. Steel Armor

Steel armor jacket is often used on direct burial outdoor cables and it provides excellent crush resistance and is truly rodent-proof. Since steel is a conductor, steel armored cables have to be properly grounded and loss fiber optic cable's dielectric advantage.

Applications:

1) Outdoor direct burial cables
2) Fiber cables used for industrial environment where cables are installed without conduits or cable tray protection

Features:

1) Provides excellent crush resistance for outdoor direct burial cables
2) Protects cables from rodent biting
3) Decreases water ingress into the fiber which prolongs the fiber cable's life expectancy

6. Central Strength Member

For large fiber count cables, a central strength member is often used. The central strength member provides strength and support to the cable. During fiber optic cable installation, pulling eyes should always be attached to the central strength member and never to the fibers. On fiber splice enclosure and patch panel installations, the cable central strength member should be attached to the strength member anchor on the enclosure or patch panel.

By: Colin Yao

Colin Yao is an expert on fiber optic technologies and products. Learn even more about plastic optical cable, plastic optical fiber pof and plastic optical fibers on Fiber Optics For Sale Co. web Site.

Additional enhancements to our computer systems by Computer Adapters And Cables

Lot's of people try get some top PC components to set up their desktop computer,But
most of them are unaware our PC preferment can be influenced by the use of cable and adapter.
Connect Your PC With Best Computer Adapters And Cables .

Every aspect of our lives today largely depends upon the computer systems. We need to have effective computer systems to complete various tasks, whether general or specific. Computer is a useful device that helps us in solving our logical problems and keeps the record of our data in its storage memory. For a properly working computer we are required to have proper connectivity of computer cables and adapters.

Computer adapters are required to connect various additional enhancements to our computer systems. We have various kinds of computer adapters to connect various components of the computers. We have various adapters like gender changers, mini centronics adapters used as connective modular for the computer. In order to connect various video and audio cables we are required to have the adapter that can provide a proper connectivity to the computer and the video or the audio devices. Connectivity of keyboard of a computer also largely depends upon the great connective computer cables and effective adapters.

Today we are required to have proper connection in of the various attached computer cables with the computer system. Every component like mouse, keyboard, speakers, and monitor are connected with the system in the network of systematic computer cable connections. In order to attach all the components together we are required to have good quality computer cables. Every time a connection may fail due to the bad connection. Normally we avoid the requirement of the perfect computer cables and do not stress upon the need to have the best connectivity between the various additional enhancements in the computer systems.

Today we have access to various good quality computer cables available in the market. We need cables for connecting the system and its devices together. Firstly, we need to have some good quality power cables that can allow us the good power flow without any failure of power supply. In order to connect devices like printer and scanner we again are required to connect these computer cables to our system that allow us to have the connection of the both the printer and the other devices.


Using right kind of computer cables and adapters is very essential as they allow you to have the good performance of your computer system.



Spot by:http://www.pcknowhow.co.nr/ written by:Victor Epand
Victor Epand is an expert consultant for computers, laptops and software. When shopping for used computers, used laptops and used software, we recommend you shop at only the best online stores for used backup software, used computer cables software, used computer cables software, affordable used computer cables software.

SATA connection

SATA (Serial Advanced Technology Attachment) -.SATA is a serial link - Transfer rates for Serial ATA begin at 150 MBps and SATA II 300MBps. The benefits including: Faster throughput, thinner 7-pin cable (as opposed to the IDE 40 pin ribbon cable) that provide better airflow through out the case, support for longer cables, and hot-swappable.Unlike Ide connection.There are no jumpers and each device connects to its own controller channel.

IDE connection

Most system board support two IDE connectors. Each IDE connector can run two drives ,so we will albe to connect up to four hard drives, CD-RWs, DVDs, etc. more drive capability can be done by adding an expansion card. Four drives are usually more than adequate for most systems .And the latest trend up to date is Sata connection(Serial Advanced Technology Attachment) which will totally replace IDE connection.

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