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

Claim 0:
1. A transmission apparatus comprising:
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 first ends are configured to transmit received signals received by the second communication devices to the first communication devices,
each of the second ends is configured to select any one of the received signals transmitted from the second communication devices,, the transmission apparatus further comprises a redundancy information extractor configured to acquire redundancy information indicating a redundant state of the second communication devices from the second communication devices, and a redundancy controller configured to control one of the received signals selected by each of the second ends based on the redundancy information, wherein
the redundancy controller is provided on a main board while each of the first communication devices and the second communication devices is attachably and detachably connected to the main board.