| 摘要 |
PURPOSE:To allow a subscriber to know that service registration for incoming transfer, etc., is not canceled, by reporting that the service is still effective at a terminal device under the service by a short ring control signal from a base station when there is an incoming call for the terminal device. CONSTITUTION:Once the terminal device 1 is registered for the incoming transfer service to the base station 3, incoming calls for the terminal device 1 are transferred to a subscriber 6 at a transfer destination, but every time this service is carried out, the short ring signal to the terminal device 1. On receiving this short ring signal, the terminal device 1 knows the incoming transfer service is effective through a tone generator. |
