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Telegraphs & Telex | The Public Telegraph Service |
Telex Service | The Teleprinter Private Services |
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The Public Telegraph Service for the transmission and receipt of telegrams (typed messages) generally was established first, followed by the Telephone Service for the transmission of voice messages. Later, private teleprinters were connected via the Telephone Service to give a dial-up form of Private Telegraphs. The telephone network was not suitable for sending telegraphic messages and thus the Telex Service (a separate dial-up teleprinter network) evolved.
Today's legacy copper network still isn't entirely suited to the transmission of fax and Internet traffic, but ingenious signalling techniques and modern equipment overcomes these deficiencies!
The Telegraph Services
By 1969, there were three distinct Telegraph services provided by the Post Office:
These were (rented) point to point, or multipoint, private wires designed to carry teleprinter traffic between business customers' premises. Circuits date from (at least) the 1950s and were the forerunners of the later Datel Service.
Typical speeds offered were:
Tariff H 50-baud and Tariff J 75-baud.
In 1970, the equipment consisted of teleprinters 15B and a signalling units TG 2164.
Ref: EI P.W.s & Telex A3114
International Telegraphs - A site to remember Post Office and BT people who provided these services from the 1950s to the 1980s.
Telegrams Online offer a personal greetings telegram service. [From July 2003]
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4th July 2013.
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