10-11-2012, 06:22 PM
COMMUNICATION SYSTEM AT INDIAN OIL CORPORATION LIMITED
OFC COM.ppt (Size: 531.5 KB / Downloads: 38)
INDIAN OIL CORPORATION LIMITED
Indian Oil Corporation Limited, or Indian Oil is an Indian state-owned oil and gas corporation with its headquarters in New Delhi, India. The company is the world's 83rd largest public corporation, according to the Fortune Global 500 list, and the largest public corporation in India when ranked by revenue. Indian Oil and its subsidiaries account for a 47% share in the petroleum products market, 34% share in refining capacity and 67% downstream sector pipelines capacity in India. The Indian Oil Group of Companies owns and operates 10 of India's 21 refineries with a combined refining capacity of 65.7 million metric tons per year.
Bijwasan pump station
The Bijwasan Station is a Pump Station cum Delivery Station. The oils are pumped and delivered to different routes. This has also got the Reverse Pumping Facility by which it can get the products from Panipat Refinery in case of shortage.
MICROWAVE COMMUNICATION
Microwave transmission refers to the technology of transmitting information or energy by the use of radio waves whose wavelengths are conveniently measured in small numbers of centimeter; these are called microwaves.
Microwaves are widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna
Advantage is that the high frequency of microwaves gives the microwave band a very large information-carrying capacity; the microwave band has a bandwidth 30 times that of all the rest of the radio spectrum below it.
A disadvantage is that microwaves are limited to line of sight propagation; they cannot pass around hills or mountains as lower frequency radio waves can.
Line of sight is a term which is only partially correct when describing microwave paths. Atmospheric conditions and certain effects modify the propagation of microwaves so that even if the designer can see from point A to point B (true line of sight), it may not be possible to place antennas at those two points and achieve a satisfactory communication performance.
OPTICAL FIBRE COMMUNICATION
Optical Fibre is new medium, in which information (voice, Data or Video) is transmitted through a glass or plastic fibre, in the form of light, following the transmission sequence give below :
(1) Information is encoded into electrical signals.
(2) Electrical signals are converted into light signals.
(3) Light travels down the fibre.
(4) A detector changes the light signals into electrical signals.
(5) Electrical signals are decoded into information.