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Utility poles are used by birds for nesting and to rest on. [30] [31] Utility poles and related structures are regarded by some to be a form of visual pollution [citation needed]. Many lines are placed underground for this reason, in places of high population density or scenic beauty that justify the expense.
Utility pole with electric lines (top) and telephone cables. Fixed telephone lines per 100 inhabitants, 1997–2007. Cross section of telephone cable of 1,800 twisted pairs, 1922. A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [1]
Poles, from which these buildings get their name, are natural shaped or round wooden timbers 4 to 12 inches (100 to 300 mm) in diameter. [4] The structural frame of a pole building is made of tree trunks, utility poles, engineered lumber or chemically pressure-treated squared timbers which may be buried in the ground or anchored to a concrete slab.
One Touch Make Ready (also known as One Touch, and often abbreviated as OTMR) is the various statutes and local ordinances passed by various local governments and utilities in the United States, which require the owners of utility poles to allow a single construction crew to make changes to multiple utility wires.
A Western Electric desk stand telephone of the 1920s and 30s. The candlestick telephone (or pole telephone) is a style of telephone that was common from the late 1890s to the 1940s. A candlestick telephone is also often referred to as a desk stand, an upright, or a stick phone. Candlestick telephones featured a mouthpiece (transmitter) mounted ...
List of the mainly electro mechanical switching systems from Hasler AG Bern, which were used in public telephone network in Switzerland for many decades. Hasler AG finally merged into Ascom in 1987. HS 25 (modified from the Ericsson OL-100 system with double relays and 25-point selector (Ericsson license), mainly used for small villages and ...
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The poles carry supply voltages from 240 to 275,000 volts and come in various sizes from 9–26 m (30–85 ft) in length, though studies indicate heights to 36 m (118 ft) are feasible. [6] The service life of a Stobie pole is predicted to be in excess of 80 years. It is now commonly regarded as a South Australian icon. [5] [7]
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