Toll — The word toll has several meanings.*In the context of transportation: **toll road, toll bridge, toll tunnel, and toll house, where money is collected in return for the use of the facility. **Electronic toll collection, high occupancy toll, shadow … Wikipedia
Toll-free telephone number — A toll free, Freecall, Freephone, or 800 number is a special telephone number, in that the called party is charged the cost of the calls by the telephone carrier, instead of the calling party. The cost of the call to the called party is usually… … Wikipedia
Class 4 telephone switch — A Class 4, or Tandem, telephone switch is a U.S. telephone company central office telephone exchange used to interconnect local exchange carrier offices for long distance communications in the Public Switched Telephone Network. A Class 4 switch… … Wikipedia
List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… … Wikipedia
Direct distance dialing — (DDD) or direct dial is a telecommunications term for a network provided service feature in which a call originator may, without operator assistance, call any other user outside the local calling area. DDD requires more digits in the number… … Wikipedia
Telephone exchange — A telephone operator manually connecting calls with cord pairs at a telephone switchboard. In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls. A central… … Wikipedia
Via Net Loss — is a network architecture for telephone calls using circuit switching systems deployed in the 1950s with Direct Distance Dialing and used until the late 1980s. The purpose of the VNL plan and five level long distance switching hierarchy was to… … Wikipedia
Phreaking — is a slang term coined to describe the activity of a subculture of people who study, experiment with, or explore telecommunication systems, like equipment and systems connected to public telephone networks. The term phreak is a portmanteau of the … Wikipedia
telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… … Universalium
North American Numbering Plan — NANPA redirects here. For other uses, see Nanpa (disambiguation). This article is about the numbering plan. For a list of area codes under the plan, see List of North American Numbering Plan area codes. The North American Numbering Plan (NANP) is … Wikipedia
