| 摘要 |
PROBLEM TO BE SOLVED: To provide a telephone system for suppressing human errors when constructing a telephone system by displaying the number of connectable telephone terminal devices explicitly. SOLUTION: Since power consumption of all telephone terminal devices 110-n to be accommodated in the telephone control device 120, that is, electric energy supplied by a telephone controller 120 can be recognized by recognizing the power supply voltage values of all of the telephone terminal devices 110-n to be accommodated in the telephone controller 120, the number of connectable telephone terminal devices 110-n is derived by recognizing remaining power of the electric energy that can be supplied by the power controller 120. COPYRIGHT: (C)2011,JPO&INPIT
|
