land line

In the UK Land-Line is a comprehensive dataset, provided by Ordnance Survey, depicting man-made and natural features ranging from houses, factories, roads and rivers to marshland and administrative boundaries. Land-Line is a vector format (compare with DXF). Land-Line has been superseded by MasterMap.
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A landline, main line or fixed-line is a telephone line which travels through a solid medium, either metal wire or optical fibre. This is distinguished from a mobile cellular line, where the medium used is the airwaves. Landlines usually cost less than cellular lines and provide better voice quality, and are used when there is no need for mobility or where cellular service is unavailable. A land line is also used to increase the security of communications, as it cannot be intercepted by a receiver without physical access to the line. (This does not, however, mean that a telephone company will not send the call over the air on some point in the journey.)
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Noun
1. a telephone line that travels over terrestrial circuits; "a land line can be wire or fiber optics or microwave"
(synonym) landline
(hypernym) telephone line, phone line, telephone circuit, subscriber line, line

A colloquial name for conventional telephone facilities. Note: Land lines include conventional twisted-pair lines, carrier facilities, and microwave radio facilities for supporting a conventional telephone channel, but do not include satellite links or mobile telephone links using radio transmissions.

land-line
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