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A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. It is designed to reproduce speech of a quality that is understandable. [1] It is the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network, and ...
The modern demarcation point is the network interface device (NID) or intelligent network interface device (INID) also known as a "smartjack". [2] The NID is the telco's property. The NID may be outdoors (typically, mounted on the building exterior in a weatherproof box) or indoors. The NID is usually placed for easy access by a technician.
Individual local loop telephone lines are connected to a remote concentrator. In many cases, the concentrator is co-located in the same building as the switch. The interface between remote concentrators and telephone switches has been standardised by ETSI as the V5 protocol. Concentrators are used because most telephones are idle most of the ...
A landline ( land line, land-line, main line, fixed-line, and wireline) is a telephone connection that uses metal wires from the owner's premises also referred to as: POTS, Twisted pair, telephone line or public switched telephone network (PSTN). Landline services are traditionally provided via an analogue copper wire to a telephone exchange.
The building was a core part of the AT&T Long Lines Department, housing solid-state switching equipment that required tight security and ample space. The Long Lines Department became AT&T Communications in 1984 after the Bell System divestiture. The AT&T Long Lines Building is now commonly known by its street address, 33 Thomas Street. [3]
32 Avenue of the Americas (also known as the AT&T Long Lines Building, AT&T Building, or 32 Sixth Avenue) is a 27-story, 549-foot-tall (167 m) telecommunications building in the Tribeca neighborhood of Manhattan in New York City. Completed in 1932, it was one of several Art Deco -style telecommunications buildings designed by Ralph Thomas ...
A mobile phone or cellphone or hand phone is a handheld telephone which connects via radio transmissions to a cellular telephone network. The cellular network consists of a network of ground based transmitter/receiver stations with antennas – which are usually located on towers or on buildings – and infrastructure connecting to land-based ...
The public switched telephone network ( PSTN) is the aggregate of the world's telephone networks that are operated by national, regional, or local telephony operators. It provides infrastructure and services for public telephony. The PSTN consists of telephone lines, fiber-optic cables, microwave transmission links, cellular networks ...