telephone instrument
21téléphone — (entrée créée par le supplément) (té lé fo n ) s. m. Instrument inventé par le professeur Bell aux États Unis, qui transmet les sons au loin par un appareil télégraphique. • Jusqu ici, et malgré les perfectionnements apportés depuis 1863, le… …
22telephone set — An instrument which, when connected to a telephone network, provides acoustic to electrical energy conversion and vice versa for the transmission of data …
23telephone — An instrument for transmitting or receiving articulate speech electrically. Richmond v Southern Bell Tel. & Tel. Co. 174 US 761, 43 L Ed 1162, 19 S Ct 778. An apparatus for the transmission of human speech or other sounds over distances greater… …
24telephone token — A small flat piece of metal placed in a slot in a public telephone to activate the instrument for use …
25Business telephone system — Early model 464G Western Electric key telephone set A business telephone system is any of a range of a multiline telephone systems typically used in business environments, encompassing systems ranging from small key systems to large scale private …
26Key telephone system — A key system or key telephone system is a multiline telephone system typically used in small office environments.Key systems are noted for their expandability and having individual line selection buttons for each connected phone line, however… …
27Cordless telephone — A cordless telephone with base. A cordless telephone or portable telephone is a telephone with a wireless handset that communicates via radio waves with a base station connected to a fixed telephone line, usually within a limited range of its… …
28Invention of the telephone — The modern telephone is the result of work done by many people, all worthy of recognition of their contributions to the field. Alexander Graham Bell was the first to patent the telephone, an apparatus for transmitting vocal or other sounds… …
29mobile telephone — Introduction also called mobile phone portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data. Mobile phones typically connect to the public switched telephone network (PSTN)… …
30History of the telephone — The history of the telephone chronicles the development of electrical technology that enabled bidirectional human speech conversations over distances farther than a person could shout.Telephone prehistoryMechanical devicesBefore the invention of… …
