Patent ID: 6088358
Filing Date: 2000-07-11
Classification: H04L

Abstract:
An ATM exchange connected to a plurality of transmission paths respectively connected to terminals comprising:a switch section having a communication path set therein to connect one terminal to another terminal and transmitting a cell sent from said one terminal to said another terminal through said communication path;a substitute terminal registration table in which a second terminal to be a substitute for a first terminal as a substitute terminal is registered;a control section, in a case that a third terminal requests said control section to set said communication path in which said first terminal is set as a connection destination connecting said communication path between said third terminal and said first terminal when setting of said communication path between said third terminal and said first terminal is possible, otherwise connecting said communication path between said third terminal and said s econd terminal registered in said substitute terminal registration table when setting of said communication path is not possible;wherein substitute terminals grouped by bandwidth are serially registered in said substitute terminal registration table in order of the bandwidth; andsaid control section retrieves said second terminal, which can become a substitute terminal for said first terminal, from said substitute terminal registration table by using a band size requested by said third terminal as an index, and establishes said communication path between said third terminal and said second terminal which is retrieved.