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TOTAL COMMUNICATION SYSTEMS S
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TOTAL COMMUNICATION SYSTEMS S
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Application filed by TOTAL COMMUNICATION SYSTEMS SfiledCriticalTOTAL COMMUNICATION SYSTEMS S
Priority to ES467362ApriorityCriticalpatent/ES467362A1/en
Publication of ES467362A1publicationCriticalpatent/ES467362A1/en
Improvements in telephone device circuits, of the type comprising an electroacoustic transducer device, a phonoelectric transducer device and switching means operable by a support for at least one of these devices, to pass the circuit from a standby or standby state to a state of transmission, characterized essentially by the provision of an additional switching device, suitable for connecting the electroacoustic transducer device with an audio signal source when the switching means are in the position or waiting state, and this electroacoustic transducer is developed as a loudspeaker, so that the apparatus is able to, in said resting or waiting position, emit acoustic signals independent of the operation of the telephone installation. (Machine-translation by Google Translate, not legally binding)
ES467362A1978-02-281978-02-28Improvements in circuits of telephone appliances. (Machine-translation by Google Translate, not legally binding)
ExpiredES467362A1
(en)