| 摘要 |
PURPOSE:To attain direct talking with one dialing via a general telephone network by sending a caller telephone number to a portable radio telephone set via a radio call control station so as to allow the portable telephone set to dial the telephone number automatically. CONSTITUTION:A subscriber exchange 2 holds a line leading to a telephone set 1 and a telephone number of a portable radio telephone set 9 and a telephone number (caller ID) of the telephone set 1 are sent to a radio call control station 7 through a signal line 12, the radio call control station 7 utilizes the radio call system to call the portable radio telephone set 9 and to inform the caller ID. The portable radio telephone set 9 calls the caller ID automatically, a radio base station 8 calls the caller ID to the subscriber exchange 5 and the subscriber exchange 5 ensures the line up to the subscriber exchange 2. Thus, the direct communication between lots of unspecified parties and a party possessing the portable radio telephone set provided with a radio call reception function whose location is unclear is attained by one dialing via a general telephone network without intervention of the operator. |
