Bypass control system based upon NMS control in ATM exchanger

In an ATM exchanger including:

• an input-side cell header translator that is connected to a plurality of other ATM exchangers connected to one another via communication lines, receives a cell transmitted on via a communication line, translates PVC identification information of the received cell to header translation information used within the ATM exchanger, and outputs the header translation information to a switch portion in a succeeding stage;
• and
• N cell header translators that perform mutual translation between the header translation information and the PVC identification information used with respect to output lines to output the resulting information,
• where, among the N cell header translators, one cell header translator is used as a first cell header translator with respect to a master connection and a part of or all of the remaining cell header translators are used for setting a bypass connection,
• a bypass control system based upon NMS control in an ATM exchanger comprising:
• means that sets bypass information with respect to the cell header translator used as the cell header translator for use on bypass connection beforehand and that, according to a request to set a bypass route from the network management system, stores in the first cell header translator the information of the cell header translator that is used with regard to the master connection;
• and
• means that, when a request to switch to the bypass route is received from the network management system, initializes the first cell header translator to reset the set information of the master connection and
• that performs loop-back, to the output of the second cell header, of an output cell with respect to the master connection that has been received by the first cell header and has been transferred from the input-side cell header.

In an ATM exchanger including:

• an input-side cell header translator that is connected to a plurality of other ATM exchangers connected to one another via communication lines, receives a cell transmitted on via a communication line, translates PVC identification information of the received cell to header translation incoming used within the ATM exchanger, and outputs the header translation incoming to a switch portion in a succeeding stage;
• and
• N cell header translators that perform mutual translation between the header translation incoming and the PVC information used with respect to output lines to output the resulting information,
• where, among the N cell header translators, one cell header translator is used as a first cell header translator with respect to a master connection and a part of or all of the remaining cell header translators are used for setting a bypass connection,
• a bypass control system based upon NMS control in an ATM exchanger comprising:
• means that sets bypass information with respect to the cell header translator used as the cell header translator for use on bypass connection beforehand and that, according to a request to set a bypass route from the network management system, stores in the first cell header translator first cell header incoming information of the first cell header translator that is used with regard to the master connection and second cell header incoming information that is to be output to the cell header translator for use on bypass connection;
• and
• means that, when a request to switch to the bypass route is received from the network management system, initializes the first cell header translator to reset the first cell header incoming information including set information of the master connection and
• that reads out the second cell header incoming information previously stored in the first cell header translator and thereby performs loop-back, to the output of the second cell header translator, of an output cell with respect to the master connection that has been transferred from the input-side cell header translator.