PURPOSE: To easily revise the wire connection state and its function at a terminal in a zone box of each zone and to allow the user to recognize the connection state at a glance. ;CONSTITUTION: A desired terminal 12 of a primary side terminal group X allocated fixedly by function with exchange cords 14-18 in an intermediate wiring board 6 is connected to a desired terminal 13 of a secondary side terminal group Y allocated fixedly by the permutation of terminals 2, 3 of each of zones ZA-ZE. Thus, a function of a specifix extension number or the like is given to the terminals 2, 3 in the zones ZA-ZE when the terminals are used for, e.g. a telephone line and the connection relation is confirmed by observing the intermediate wire panel 6 at a glance.;COPYRIGHT: (C)1994,JPO&Japio
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