TELECOMMUNICATION TERMINAL WITH DEVICE FOR VISUAL SIGNALLING Russian patent published in 2001 - IPC

FIELD: means of visual signalling of telephone call or other signalling. SUBSTANCE: the telecommunication terminal has a visual signalling device, which, on one side, may be connected via the first diode in the forward direction and via the first fork switch to the first conductor of the exchange line, and on the other side, it is connected via the second diode in the forward direction to the second conductor of the exchange line. Cut in between the first diode and the visual signalling device is the cathode of the third diode, whose anode via the second fork switch and the fourth diode with the same direction of polarity as of the third diode, may be connected to the first conductor. Due to it, the visual signalling device may be used both for visual signalling at a receipt of a call, and for some other type of signalling, for example, signalling with an expectation of a message. For realization of a non- flickering visual signalling at a receipt of a call the anode of the fifth diode is connected to the anode of the second diode, and the cathode is connected to the anode of the fourth diode, and the cathode of the sixth diode is connected to the cathode of the fourth diode, and the anode is connected to the cathode of the second diode. EFFECT: simplified visual signalling. 9 cl, 1 dwg