| 摘要 |
PURPOSE:To relieve a CPU load relating to communication and the line utility rate by suppressing a useless dialing in response to the cause to a failed dialing with respect to the dial retrial suppression method in plural paths in the network system having plural communication paths between an opposite party system for communication. CONSTITUTION:A field 17 in which a fault reason code representing retrial enable/disable is set is provided in information of connection establish reply 16 and when a route through which a call to a destination is available is not in existence in a relay node, a fault reason code representing retrial disable is set in the field 17 to return a reply of connection establishment failure. A caller node or a relay node on its way suppresses a dial retrial via a final relay node responsible for the retrial disable when the failure reason code in the information indicates retrial disable with respect to the reply of connection establishment fault. |
