| 摘要 |
A system for effecting communication between first and second radio transceivers, comprises a communicator for effecting communication between the first and second radio transceivers over a first channel; a determiner for determining the distance between the transceivers, and for determining if the distance falls below a predetermined threshold; and a channel charger responsive to a positive determination, for effecting direct mode communication between the transceivers over a second channel.
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