TERMINAL CONNECTION CONTROL SYSTEM IN EXCHANGE

PROBLEM TO BE SOLVED: To attain sure and smooth communication on the occurrence of a busy line by allowing a control section to make connection to a caller terminal making line interruption via an interrupted line when an interrupt detection section detects the interrupted line with respect to a communication interrupt request notice. SOLUTION: An interrupt request notice section 1b extracts path dependent interrupt control data 20a stored in a memory 2 and a terminal equipment 4a identifies all terminal equipments using a line of a path desired to be used by the terminal equipment 4a. Then the terminal equipment 4a controls a speech line 3 to be connected to a talkie trunk 7 and to terminal equipments 4b, 4c in a busy state and to be identified thereby sending an announcement urging line interruption to the terminal equipments 4b, 4c. When a number transmission command section 1 of a control section 1 is started while sending the announcement of urging line interruption to the busy terminal equipments, the entry of an opposite terminal equipment number desired to be connected via the line is commanded to the terminal equipment 4a making the interrupt request. In this case, the opposite terminal equipment number is inserted into opposite number data 20b stored in the memory 2 and the data are used for line connection control for the terminal equipment 4a after the line interruption.