Telephonic equipment device for e.g. cable telephony wiring, in house of aged person, has detector unit for controlling generator unit generating signal indicating occupation state of line, and signaling unit for warning state of line

摘要

The device has a percutaneous cable (110) connected to a telephone jack of a telephone line of a cable house wiring. A voltage detector unit (202) is constituted of resistors, zener transistors and field-effect transistor to detect the sensitivity to the voltage available at terminals of the jack. The detector unit automatically controls a generator unit generating a signal indicating an occupation state of the line, when the variation of predefined voltage is detected at the terminals. A signaling unit (102) warns the occupied state of the line during the control of the signal.