A telephone exchange, also known as a telephone switch or central office, is a crucial component in the public switched telephone network (PSTN) or large...

A telephone exchange name or central office name was a distinguishing and memorable name assigned to a central office. It identified the switching system...

Kingsway telephone exchange was a Cold War-era hardened telephone exchange underneath High Holborn in London. Initially built as a deep-level air-raid...

The AXE telephone exchange is a product line of circuit switched digital telephone exchanges manufactured by Ericsson, a Swedish telecom company. It was...

Guardian Exchange was an underground telephone exchange built in Manchester from 1954 to 1957. It was built together with the Anchor exchange in Birmingham...

(KTS) to the private branch exchange (PBX). A business telephone system differs from an installation of several telephones with multiple central office...

telephone systems took advantage of the exchange principle already employed in telegraph networks. Each telephone was wired to a telephone exchange established...

Hungarian engineer Tivadar Puskás proposed the telephone switch, which allowed for the formation of telephone exchanges, and eventually networks. In the United...

Anchor Exchange was an underground, hardened telephone exchange built in Birmingham, England. Construction commenced in 1953 under the guise of building...

the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange. The exchange completes the call...

of the telephone chronicles the development of the electrical telephone, and includes a brief overview of its predecessors. The first telephone patent...

dialing. It is used when initiating a telephone call to transmit the destination telephone number to a telephone exchange. On the rotary dial, the digits are...

telephone call or telephone conversation (or telcon), also known as a phone call or voice call (or simply a call), is a connection over a telephone network...

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...

Central Telephone Exchange - 14 July 1980 Changi Telephone Exchange Geylang Telephone Exchange Hougang Telephone Exchange Jurong Telephone Exchange Jurong...

invents the telephone switchboard exchange (later working with Edison). 9 October 1876: Bell makes the first two-way long-distance telephone call between...

The Nippon Telegraph and Telephone Corporation (NTT) (Corporate Number: 7010001065142) is a Japanese telecommunications holding company headquartered...

data record produced by a telephone exchange or other telecommunications equipment that documents the details of a telephone call or other telecommunications...

public switched telephone network (PSTN). Landline services are traditionally provided via an analogue copper wire to a telephone exchange. Landline service...

A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony...

The invention of the telephone was the culmination of work done by more than one individual, and led to an array of lawsuits relating to the patent claims...

number may have different lengths. It shows which exchange the remaining numbers refer to. A full telephone number is usually made up of a country code (required...

telegraph and telephone services). Telephone companies are common carriers, and in the United States are also known as local exchange carriers. With...

telephone exchange provided the solution for establishing telephone connections with any other telephone in service in the local area. Each telephone...

This is a list of telephone exchanges located within Greater London. Occasionally, in areas of high demand, two exchanges are located at the same premises;...

its respective numbering plan area. The telephone number consists of a three-digit central office (or exchange) code and a four-digit station number. The...

push-button telephone is a telephone that has buttons or keys for dialing a telephone number, in contrast to a rotary dial used in earlier telephones. Western...

Telephone Exchange Building may refer to: Telephone Exchange Building (Powhatan, Arkansas), listed on the National Register of Historic Places in Lawrence...

20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords...

an exchange-by-exchange basis for calls connected by manual operators. Subscriber numbers reflected demand in each area, with single digit telephone numbers...