Type 710
This was the same as a 706 but had four possible buttons or lamps fitted at the top of the case. Dummy buttons were used where neither button nor lamp was used. The ultimate task of the Tele. 710L was that of being transformed into an Extension Station of a House Exchange System No.3. (see above)
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“There is a limit to the application of democratic methods. You can inquire of all the passengers as to what type of car they like to ride in, but it is impossible to question them as to whether to apply the brakes when the train is at full speed and accident threatens.”
—Leon Trotsky (1879–1940)