| 摘要 |
An auxiliary telephone unit, to be connected between a subscriber's telephone and a telephone line to enable the subscriber's telephone to provide a selected one of a plurality of extended telephone services, includes a housing having a first electrical connector connected to the subscriber's telephone, a second electrical connector connectable to the telephone line, and an electrical control system within the housing including a microprocessor programmed to receive a password and a function code identifying the extended telephone service to be provided, and to execute the extended telephone service when the auxiliary telephone unit receives the function code identifying such service. |
