| 摘要 |
PURPOSE:To restrain the traffic increment, by using a part or all of channels, which are used by a trunk before connection switching, by a trunk after connection switching. CONSTITUTION:In a step 1, a control circuit 6 accesses a path idle and blocked storage part 8 and selects an idle path to assign it to a path (3). As the result, a part corresponding to the path (3) in the storage part 8 is blocked. In a step 2, the circuit 6 accesses a reserved path storage part 9 to store information of the path (3) selected in the step 1. In a step 3, the circuit 6 accesses the storage part 9 again to take out information of the path (3) and uses it information of a path (1). In a step 4, the circuit 6 accesses the storage part 8 and selects an idle path to assign it to a path (4). As the result, a part corresponding to the path (4) in the storage part 8 is blocked. In a step 5, the circuit 6 accesses the storage part 9 to store information of the path (4) selected in the step 4. In a step 6, the circuit 6 accesses the storage part 9 again to take out information of the path (4) and uses it as information of a path (2). |
