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material may be challenged and removed. find sources: "telephone exchange" – news · newspapers · books · scholar · jstor (march ) ( learn how and when to remove this template message ) interconnects telephones for calls a telephone operator manually connecting calls with cord pairs at a telephone switchboard...
and decoded reliably to reproduce the original digital data. modems can be used with almost any means of transmitting analog signals from light-emitting diodes to radio . a common type of modem is one that turns the digital data of a computer into modulated electrical signal for transmission over telephone...
with voice communication and broadband data capabilities a telephone exchange or telephone switch is a telecommunications system used in the public switched telephone network or in large enterprises. it interconnects telephone subscriber lines or virtual circuits of digital systems to establish telephone...