| 摘要 |
PURPOSE:To obtain a private branch exchange capable of finding the regulated state of a telephone set under a regulates state by providing a display part displaying information based on the data under the regulated state. CONSTITUTION:After a controller 6 controls an exchange circuit 4 so as to connect a subscriber circuit 2a to a trunk line circuit 3, it closes a fax switch of the trunk line circuit 3, and controls the trunk line circuit 3 so that a dial tone can be transmitted to a high-functional telephone set (EKT)1a from the trunk line. A mode flag memory (MFM) is made of two digits, and ''00'', ''01'' and ''10'' denote automatic switching, daytime and night time modes, respectively. Each mode is switched by an input from a class changeover switch 7. The controller 6 can discriminate whether or not dial data transmitted from each terminal are an object of outgoing regulation based on the contents of a memory 5, and when they are the object, the controller 6 prohibits the outgoing. |
