ON/OFF SIGNAL SIGNALING CIRCUIT

• Main Authors: EDA SUSUMU, MATSUMOTO MASAYUKI
• Format: Patent
• Language: English
• Published: 22.12.1989
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; SELECTING; TELEPHONIC COMMUNICATION

PURPOSE:To cope with all conventional four type signaling systems by providing a changeover control means controlling the switching of a switching means in response to the input corresponding to the ON/OFF state. CONSTITUTION:A 1st switching means 14 switches an inputted ON or OFF signal to the position of a 1st current detection means 15 or a 2nd current detection means 16 in response to the designation of a type designation means 13. The 1st current detection means 15 detects a current in a direction flowing from the 1st switching means 14 and the 2nd current detection means 16 detects a current flowing in the opposite direction to that of the 1st current detection means 15, that is, the current flowing to the 1st switching means 14. An output means 17 outputs an output signal when the 1st current means 15 or the 2nd current detection means 16 detects a current. The a switching control means 18 controls a 2nd switching means 19 in response to the signal inputted thereto and the 2nd switching means 19 outputs an ON signal or an OFF signal in response to the control of the switching control means 18. Thus, one circuit can cope with the four signaling systems.