(communications, obsolete) Acronym for teleprinter exchange. A printed message transmitted from and to teleprinters over public telecommunications networks. Teleprinters (popularly known as telex machines) were very large and noisy character printers that operated as electric typewriters and were fed paper from a continuous roll. Telexes have been completely obsoleted by fax machines and now by e-mail and other forms of messaging such as SWIFT (for messaging between banks).

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