| 摘要 |
PURPOSE:To provide the telephone service limited in the service class per person from any extension telephone by providing a service-class identification number to each person. CONSTITUTION:A telephone set 11 is connected by an information line 16 to the CPU14 through a subscriber's circuit 12, and also is connected to a transmission register 13 through a connection line 18 under the control of the CPU14. The register 13 is connected to the CPU14 via an information line 17, while the CPU14 is connected to a memory 15. If the subscriber takes the handset of telephone 11 off the hook, the subscriber's circuit 12 is connected to the register 13 by the control of the CPU14, and a service class identification signal transmission request tone is transmitted to the caller. If the caller inputs the personal service class identification number from the telephone set 11, the CPU14 retrieves the service class correspondent to the given number from a memory 15, and thus regulates the connection in accordance with the service class. |
