Fibre-optic communication is a method of transmitting information from one place to another by sending pulses of infrared light through an optical fibre. The light is a form of carrier wave that is modulated to carry information. Fibre is preferred over electrical cabling when high bandwidth, long distance, or immunity to electromagnetic interference is required. This type of communication can transmit voice, video, and telemetry through local area networks or across long distances.
Optical fibre is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached a record bandwidth–distance product of over 100 petabit × kilometers per second using fibre-optic communication.
The Metropolitan Borough of Bolton /ˈboʊltən/ (About this soundlisten) is a metropolitan borough of Greater Manchester, England, named after its largest town, Bolton, but covering a far larger area which includes Blackrod, Farnworth, Horwich, Kearsley, Westhoughton, and part of the West Pennine Moors. It has a population of 276,800.
The boundaries were set by the Local Government Act 1972, and cover eight former local government districts; seven Urban Districts from the administrative county of Lancashire, and the County Borough of Bolton. The metropolitan districts of Bury, Salford and Wigan lie to the east, south and west respectively; and the unitary authority of Blackburn with Darwen and the non-metropolitan district of Chorley in Lancashire to the north and north-west.