| 摘要 |
Communication is provided between at least two of a plurality of stations. A signal is received from a first one of the plurality of stations, and the signal is coded using a first code that is assigned to that station. The coded signal is converted to obtain a further coded signal that is decodable using a further code that is assigned to at least a second one of the plurality of stations. The further coded signal is transmitted for delivery to at least the second one of the plurality of stations.
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