TELEPHONE EXCHANGE, TELEPHONE EXCHANGING SYSTEM, CONTROL METHOD OF TELEPHONE EXCHANGE, AND CONTROL METHOD OF TELEPHONE EXCHANGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To prevent unauthorized use of a telephone exchange or a telephone terminal. SOLUTION: In the CPU 112 of a main unit 1A, a decision is made whether a user of a button telephone terminal T1, T2 has au authorized right of using the main unit 1A or not utilizing system type information stored in a memory 114 incapable of writing information when the system is started and before call processing operation is executed, and use of the button telephone terminal T1, T2 is granted based on the decision results. COPYRIGHT: (C)2005,JPO&NCIPI