FIBER OPTIC/VSAT CONNECTION: internet connection

FIBER OPTIC/VSAT CONNECTION: internet connection: "A fiber-optic system is similar to the copper wire system that fiber-optics is replacing. The difference is that fiber-optics use light pul..."

internet connection

A fiber-optic system is similar to the copper wire system that fiber-optics is replacing. The difference is that fiber-optics use light pulses to transmit information down fiber lines instead of using electronic pulses to transmit information down copper lines. Looking at the components in a fiber-optic chain will give a better understanding of how the system works in conjunction with wire based systems.

At one end of the system is a transmitter. This is the place of origin for information coming on to fiber-optic lines. The transmitter accepts coded electronic pulse information coming from copper wire. It then processes and translates that information into equivalently coded light pul
ses. A light-emitting diode (LED) or an injection-laser diode (ILD) can be used for generating the 
light pulses. Using a lens, the light pulses are funneled into the fiber-optic medium where they travel 
down the cable. The light (near infrared) is most often 850nm for shorter distances and 1,300nm for longer distances on Multi-mode fiber and 1300nm for single-mode fiber and 1,500nm is used for  longer distances.

Transmission through Fiber-optic Connection carries data through long distances.

This wired Internet Connection has the highest data rates of any communication infrastructure. It has long been used in backbone networks such as SDH/SONET. Fiber optic connection has now spread from the core to the Metro Area Network (MAN).

Types of Fiber-Optic Cable Connection

·         Single Mode

·         Multimode

·         Plastic optical fiber

Single Mode cable is a single stand (most applications use 2 fibers) of glass fiber with a diameter of 8.3 to 10 microns that has one mode of transmission.  Single Mode Fiber with a relatively narrow diameter, through which only one mode will propagate typically 1310 or 1550nm. Carries higher bandwidth than multimode fiber, but requires a light source with a narrow spectral width. Synonyms mono-mode optical fiber, single-mode fiber, single-mode optical waveguide, uni-mode fiber.

Single Modem fiber is used in many applications where data is sent at multi-frequency (WDM Wave-Division-Multiplexing) so only one cable is needed - (single-mode on one single fiber)

Single-mode fiber gives you a higher transmission rate and up to 50 times more distance than 
multimode, but it also costs more. Single-mode fiber has a much smaller core than multimode. The small core and single light-wave virtually eliminate any distortion that could result from overlapping light pulses, providing the least signal attenuation and the highest transmission speeds of any fiber cable type.  

Single-mode optical fiber is an optical fiber in which only the lowest order bound mode can propagate at the wavelength of interest typically 1300 to 1320nm.

Multi-Mode cable has a little bit bigger diameter, with a common diameters in the 50-to-100 micron range for the light carry component (in the US the most common size is 62.5um). Most applications in which Multi-mode fiber is used, 2 fibers are used (WDM is not normally used on multi-mode fiber).  POF is a newer plastic-based cable which promises performance similar to glass cable on very short runs, but at a lower cost.

Multimode fiber gives you high bandwidth at high speeds (10 to 100MBS - Gigabit to 275m to 2km) over medium distances. Light waves are dispersed into numerous paths, or modes, as they travel 
through the cable's core typically 850 or 1300nm. Typical multimode fiber core diameters are 50, 62.5, and 100 micrometers. However, in long cable runs (greater than 3000 feet [914.4 meters), multiple paths of light can cause signal distortion at the receiving end, resulting in an unclear and incomplete data transmission so designers now call for single mode fiber in new applications using Gigabit and beyond.  

Advantages of Fiber-optic Connection

• A single optical fiber can carry about three trillion bits of information per second. The fastest service (fixed wireless access) approaches to million bps. So, fiber optics can be more than a million times faster.
• The number of colors on a fiber optics strand doubles every six to nine months and that too with no cost increments.
• The fiber-optic cable being a carrier of three trillion bits of information per second can download in seconds which a dial-up modem and a wireless connection cannot.
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• It is more secured than a dial-up connection or a wireless connection.
• Signals can easily be carried forward without needing to be refreshed or strengthened.
• It has greater resistance to electromagnetic noise such as radios, motors, or other nearby cables.
• It has lower maintenance costs.

Light pulses move easily down the fiber-optic line because of a principle known as total internal reflection. "This principle of total internal reflection states that when the angle of incidence exceeds a critical value, light cannot get out of the glass; instead, the light bounces back in. When this principle 
is applied to the construction of the fiber-optic strand, it is possible to transmit information down fiber lines in the form of light pulses. The core must a very clear and pure material for the light or in most cases near infrared light (850nm, 1300nm and 1500nm). The core can be Plastic (used for very short distances) but most are made from glass. Glass optical fibers are almost always made from pure silica, but some other materials, such as fluorozirconate, fluoroaluminate, and chalcogenide glasses, are used for longer-wavelength infrared applications.

pricing for fiber connection:

FIBER SERVICES AND PRICES

As for the fiber services, pricing for the fiber services is comprised of the internet capacity as well as the local loop pricing to deliver that capacity to the customers doorstep. Due to this reason prices may vary based on customer’s location and means of deployment used. Please remember this. IN order to 
receive an accurate quote I will need to know the exact address of the customer location.

The bandwidth pricing only for fiber are as follows (not including local loop):

Nigeria Fiber Services

Service (Mbps Quantity)	Internet Transit (Price/Mbps)
1-2	$1,600
3-10	$1,400
11-30	$1,300
31-50	$1,100
51-100	$900
101-155	$800

Service is sold in Mbps
*Service is symmetrical duplex – ie. E1=2/2Mpb

for more info contact Oluchi Pearse: +2348154792701, 07062802971

sales@madutechngltd.com.ng

 oluchi@madutechngltd.com.ng

www.madutechngltd.com.ng