Patent ID: 7881187
Filing Date: 2011-02-01
Classification: H04J,H04L

Abstract:
1. A transmission apparatus which accommodates a plurality of asynchronous networks and SONET/SDH networks, comprising: a plurality of transmitting side line interfaces which convert packet format data sent from the asynchronous networks to a SONET/SDH frame format which is a time division multiplexing frame format and then transmit the data; a plurality of receiving side line interfaces which receive the SONET/SDH frame format data and convert at least part of the received data to packet format data; a SONET/SDH network interface which relays the SONET/SDH network; and a circuit switching section which sends and receives SONET/SDH frame format data between the SONET/SDH network interface, the plurality of transmitting side line interfaces and the plurality of receiving side line interfaces and switches circuits between the SONET/SDH network interface, the plurality of transmitting side line interfaces and the plurality of receiving side line interfaces based on a predetermined circuit setting, wherein the circuit switching section duplicates at least one type of data out of a plurality of types of data multiplexed in a SONET/SDH frame and transmits the duplicated data to a predetermined number of receiving side line interfaces according to a predetermined circuit setting out of the plurality of receiving side line interfaces, and if a fault occurs in one of the predetermined number of receiving side line interfaces, the circuit switching section stops duplicating and transmitting for the one of the predetermined number of receiving side line interfaces and continues duplicating and transmitting for remaining receiving side line interfaces of the predetermined number of receiving side line interfaces.