| 摘要 |
<p>PROBLEM TO BE SOLVED: To select a main line in the satisfactory state of high speaking quality for a specified extension concerning the method of main wire selection depending on a main wire group number. SOLUTION: When the input of a main wire group number is confirmed in a step 301 after a process of registering a prescribed extension numbers and the number of all the extensions giving priority to the optimum main wire in an optimum main wire priority table, in a step 302, whether the inputted main wire group number is the optimum main wire priority extension or not is confirmed while referring to the priority table. When it is the optimum main wire priority extension, in a step 303, it is checked whether the main wire in the satisfactory state is idle or not and when it is idle, in a step 304, that main wire is selected. When it is confirmed in the step 302 that the inputted main wire group number is not the optimum main wire priority extension, in a step 306, the idle main wire is checked and when there is any idle main wire, in a step 307, it is confirmed whether that idle main wire is the main wire in the satisfactory state or not. When it is the main wire in the satisfactory state, in a step 308, it is judged by calculating the number of priority extensions and the order of line states by main wires whether the main wire in the satisfactory state can be selected or not.</p> |
