COMMON CARRIER SELECTOR AND SYSTEM PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To control the call tariffs of respective common carriers so as to make suitable the ratio of the charges of lines of the common carriers. SOLUTION: A control computer 3b-1 selects any one of lines 2a-1, 2a-2 and 2a-3 to be used while referring to a charge meter 3b-2-2, a charge table 3b-2-3 and a charge control table 3b-2-4.