A REDUNDANT MODULE WITH THE PROTECTION FUNCTION FROM FREQUENT SWITCHOVERS AND METHOD FOR PROTECTING FREQUENT SWITCHOVERS IN TELECOMMUNICATION SYSTEMS WITH REDUNDANT STRUCTURE

摘要

PURPOSE: A duplexing module having a function for preventing what is switched at any time and a method for preventing what is switched at any time are provided to increase a reliability of a communication system by preventing what is switched at any time through a timer, and by supplying a duplexing module. CONSTITUTION: When a generated switching is an initial switching, a time value(T1) of a present interference generation time point is stored at T2, and a switching count value becomes 1. When a generated switching is not the initial switching, a time value(X) is calculated. At this time, the time value(X) is a result of extracting a time value(T2) of a final switching time point from the time value(T1) of the present interference generation time point. If the time value(X) is bigger than a reference time value(Y), the switching count value becomes 0 for an initialization. If not, the switching count value is increased by 1. After this, it is investigated whether the switching count value is bigger than a threshold or not. When the switching count value is bigger than a threshold, it is decided whether a present state is an enable state or an inactive state. On the occasion of the enable state module, a switching prevention flag is reset, and a Z timer is driven.