PROCESS FOR THE REALISATION OF AN INDEFINITE INTERRUPTION OF RENUMBERING AND APPLICATION TO A SEMI-AUTOMATIC RENUMBERING ARRANGEMENT

摘要

Apparatus for effecting a redially interruption of any optional duration starting from a redialling circuit having an input terminal and an output terminal, the output terminal supplying an interrupt voltage which efficiently interrupts the redialling operation, the current-voltage characteristic of the input terminal being such that current increases continously for voltage values between zero and a predetermined threshold value, and is almost zero for voltages higher than said threshold voltage, a diode connected from the output terminal to the input terminal, and the input terminal is connected to a voltage source for maintaining the voltage at the input terminal at a value higher than the threshold voltage when after the finite duration of the interruption has elapsed the output terminal no longer supplies the interrupt voltage.