To simplify the procedure of setting and to effectively use exchange control resource by previously registering fixed connection setting information for respective terminals, and taking out terminal identification information and setting fixed connection when the terminals become commination possible states.

When fixed connection-type channel PVC setting information from a maintenance console 10 is received, the point to point PVC control part 25 of an ATM node 20 sets PVC and registers it in a point to point PVC cross connection information storage part 26. When the terminal is stored in a port and is in the communication possible state, a terminal control part 23 reads an ATM address, notifies it to the PVC control part 25, stores an opposite terminal, sets PVC based on PVC setting information and registers it in the cross connection information storage part 26. When the terminal is in a state where it cannot execute communication, the terminal control part 23 deletes registration from a terminal information storage part 24 and the PVC control part 25 releases PVC setting and deletes information from the cross connection information storage part 26.