| 摘要 |
PROBLEM TO BE SOLVED: To reduce the resource consumption for a switch part in an asynchronous network exchange, to accelerate the connection operation and to provide an environment operable, even at the time of the fault of the switch part. SOLUTION: In this asynchronous mode exchange provided with a line concentration and distribution device 2 connected to a subscriber housing device 1 housing plural subscribers and the switch part 3, the path identification information of a subscriber cell and the information of a monitoring table are compared. So that it is detected that the subscriber housing device 1 housing a call terminating subscriber is connected to the line concentration and distribution device 2 same as the line concentration and distribution device 2 connected to the subscriber housing device 1 which houses a call originating subscriber. Then, a call from the call originating subscriber is looped back and connected to the call terminating subscriber, by way of the switch part 3. The information of the monitoring table is registered by the control of a call processor. |
