Abstract: A transmission device is connected to other transmission devices in a system configured in a ring topology. The transmission device stores, in a memory, port information items identifying a plurality of output ports connected in the ring topology, in association with each of destination information items, where the plurality of output ports form a redundant configuration and are each configured to transfer a communication signal. The transmission device detects switching information in the system which indicates the port information items related to a change in paths of the ring topology, and, with reference to the memory, executes flooding on output ports associated with the port information items, indicated by the switching information, of the redundant configuration connected in the ring topology.

Abstract: A signal distribution method and a signal distribution apparatus are disclosed, wherein transport packets of a television signal containing multiplexed channels are provided in a transmission format of a digital broadcasting standard, and such transport packets are transmitted and distributed over a synchronous network. Transmission rate (data speed) of the transport packets of a given customer in the synchronous network is selectable based on the number of multiplexed channels for the customer.

Abstract: A wireless communication terminal including a wireless communication unit for receiving and transmitting voice signals between terminals connected through a voice channel and a data channel, a signal input/output unit for inputting and outputting voice signals for voice communication and a mixing unit, interposed between the wireless communication unit and signal input/output unit, for performing mixing operations to create a first mixed signal to be output to said signal input/output unit and second mixed signals each to be transmitted to the corresponding terminal. The wireless communication terminal is preferably used for wireless voice communication performed by three or more terminals without being interposed by a center apparatus (such as a server) or a repeater. Further, signal-receiving/transmitting is set for each wireless communication terminal whereupon convenience can be improved.

Abstract: A signal distribution method and a signal distribution apparatus are disclosed, wherein transport packets of a television signal containing multiplexed channels are provided in a transmission format of a digital broadcasting standard, and such transport packets are transmitted and distributed over a synchronous network. Transmission rate (data speed) of the transport packets of a given customer in the synchronous network is selectable based on the number of multiplexed channels for the customer.

Abstract: A wireless communication terminal including a wireless communication unit for receiving and transmitting voice signals between terminals connected through a voice channel and a data channel, a signal input/output unit for inputting and outputting voice signals for voice communication and a mixing unit, interposed between the wireless communication unit and signal input/output unit, for performing mixing operations to create a first mixed signal to be output to said signal input/output unit and second mixed signals each to be transmitted to the corresponding terminal. The wireless communication terminal is preferably used for wireless voice communication performed by three or more terminals without being interposed by a center apparatus (such as a server) or a repeater. Further, signal-receiving/transmitting is set for each wireless communication terminal whereupon convenience can be improved.