| 摘要 |
Radiophones (1,2) are connected by radio paths (3,4) to base stations (5,6) of mobile phone network. This is integrated in wire connected network or connected with wire connected telephone network via gateway (8) as stand alone connection network (7). Direct radio connection is made for radio connection between the telephones or for connection with radio equipment (10) set up for additional frequency band, as no special transfer protocol is used.
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