| 摘要 |
PROBLEM TO BE SOLVED: To permit a user to easily grasp the state of calling opposite party clear-out notice service. SOLUTION: In a control circuit 1, the advancing state of calling opposite party clear-out notice service registered by using an analog telephone line L, elapse time from service registration and the number of SIR arriving times, for example, are managed. The managed advancing state of calling opposite party clear-out notice service is informed to the user.
|
