| 摘要 |
PURPOSE:To improve operability by constituting a system that a restoring process is transmitted by a dial signal succeeding to the restoration of a subscriber even if the restoration is processed as a hooking signal so as to prevent the confusion of the subscriber in operation. CONSTITUTION:The state that a telephone set 1 is connected via a switch 2 is stored in a connecting state storage section 6 in advance. When a subscriber processes the telephone set 1 for hooking, the telephone set 1 discriminated as hooking by a time count circuit 5 is connected to a register 8, a dial signal is counted and analyzed by a dial signal analysis section 7. If the numeral of the dial signal is a specific number for service function setting in succession to the hooking, a central processing unit 3 keeps the connecting processing of the service function as it is. On the other hand, if the numeral is not the specific number, the normal selecting signal is kept as the request of restoration and the connecting path stored in the connecting state storage section 6 is restored. |
