COMBINED LOUD- AND LOW-SPEAKING TELEPHONE INSTRUMENT HAVING TWO ACOUSTIC CONVERTERS

Combined loud- and low-speaking telephone instrument in one unit comprising no more than two electro-acoustic converters, one of which is used as a microphone when the telephone instrument is in its loud-speaking function position and as a telephone receiver when the instrument is in its low-speaking function position, while the other electro-acoustic converter is used as a loud-speaker when the telephone instrument is in its loud-speaking function position and as a microphone when the instrument is in its low-speaking function position. When resting on a table or a similar support a switch button which protrudes through the bottom of the telephone instrument is pressed in so as to keep this in its loud-speaking function position, and when the instrument is lifted from its support the switch button is pressed out switching the instrument to its low-speaking function position.