| 摘要 |
PURPOSE:To avoid the erroneous hooking operation due to depression of a hooking button after acquisition of a line wire which has not a transfer function, by setting whether a stored line wire is the line wire (PBX extension) having the transfer function or not (trunk line or the like) and discriminating whether the acquired line wire is said line wire or not when the hooking button is depressed after acquisition of the line wire and controlling the hooking operation effective or ineffective. CONSTITUTION:When the hooking button is depressed on a key telephone set 1 speaking to the line wire at the line wire acquisition time, button depression information is sent from the telephone set 1 to a telephone set interface 2 of a main equipment. A main control part 6 receives button information from the telephone set interface 2 and reads out PBX data in a memory 1 and sends data to a hooking discriminating command part 5. In the hooking discriminating command part 5, a CPU 51 checks first PBX data inputted from the main control part 6, and if the line wire of the hooking operation is a PBX extension, the processing is returned to the main control part 6 after hooking permitting data is sent to the main control part 6. The main control part 6 performs the known hooking operation indication. |
