Patent ID: 11916685
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A transmission method performed by a transmission apparatus which comprises: redundant first communication devices configured to communicate with a communication apparatus provided in a first network; and redundant second communication devices configured to communicate with a communication apparatus provided in a second network, wherein the second communication devices include respective first ends that are ends of redundant communication paths of the first communication devices, the first communication devices include respective second ends that are ends of redundant communication paths of the second communication devices, the transmission method comprising:
providing a redundancy controller on a main board and providing each of the first communication devices and second communication devices to be attachably and detachably connected to the main board;
transmitting, by the first ends, received signals received by the second communication devices to the first communication devices;
selecting, by each of the second ends, any one of the received signals transmitted from the second communication devices;
acquiring, by the redundancy controller, redundancy information indicating a redundant state of the second communication devices from the second communication devices; and
controlling, by the redundancy controller, one of the received signals selected by each of the second ends based on the redundancy information.