| 摘要 |
PURPOSE:To secure identification for idle or busy of the common unit without installing any special hardware, by knowing the presence or absence of the storage of the dial information at the storage area of the common area for the electronic exchange. CONSTITUTION:When subscriber A dials the special number for the pocket bell service, central control unit 8 stores the dial information to the idle place of storage area 10 corresponding to pocket bell adaptor 11 via scanner 5. Then subscriber A is connected to the incoming side of intra-office trunk 3, and the information of area 10 is transmitted to adaptor 11 via signal reception distributor 7 and signal distributor 6. Thus, the call signal is transmitted from radio unit 12. The anser special dial information of called subscriber B is memorized in transmission register 2, and unit 8 functions to connect B to the outgoing side of trunk 3. With the call start between A nd B, the contents of area 10 is cleared to perform the idle display for adaptor 11. In case the information is already stored in area 10, the busy tone is transmitted to A. |
