selector ring telephone set
1Telephone 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… …
2Distinctive ring — Distinctive ring, marketed under a variety of names, is a service offered by a telephone company that establishes additional telephone numbers on the same line as an existing number, each number ringing with a distinctive ringing pattern.… …
3Crossbar switch — In electronics, a crossbar switch (also known as cross point switch, crosspoint switch, or matrix switch) is a switch connecting multiple inputs to multiple outputs in a matrix manner. Originally the term was used literally, for a matrix switch… …
4Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… …
5Donald Bradman — Bradman redirects here. For other uses, see Bradman (disambiguation). Sir Donald Bradman …
6Electric guitar — Fender Stratocaster String instrument Classification String instrument (plucked, either by fingerpicking, or with a pick.) …
7Synchronous optical networking — (SONET) and Synchronous Digital Hierarchy (SDH), are two closely related multiplexing protocols for transferring multiple digital bit streams using lasers or light emitting diodes (LEDs) over the same optical fiber. The method was developed to… …
8Stepping switch — In electrical controls, a stepping switch is an electromechanical device which allows an input connection to be connected to one of a number of possible output connections, under the control of a series of electrical pulses. They could step on… …
9Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… …
10Steering wheel — This article is about steering wheels in cars. For the use in vessels, see Steering wheel (ship). A modern road car s steering wheel (Alfa Romeo Giulietta (2010)) …
