| 摘要 |
The invention relates to a telephone system comprising: a satellite arranged to relay a plurality of signalling channels and speech transmission channels; a plurality of earth stations having a plurality of line units each of which is connected to a subscriber, a signalling equipment connected to such line units and arranged to transmit reports about the states of such subscribers and to receive commands about allocated calling and called sides of the speech transmission channels to calling and called subscribers over the signalling channels, and a frequency synthesizer unit connected to the line units and arranged to connect the calling and called subscribers to their allocated sides of the speech transmission channels under control of the commands; and a central control station comprising central signalling equipment arranged to receive the reports and transmit the commands, and a control equipment connected to the central signalling equipment and arranged to generate the commands and address them to the earth stations.
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