| 摘要 |
The invention concerns a system for transmitting information in a digital radio network system ( 12 ) between at least two modes of operation, which may be-a direct mode operation (DMO) between two terminal devices ( 10.1, 10.2 ) operating independently of the physical radio network system ( 21 ) and-a trunked mode operation (TMO) supporting distribution of network resources and operating in the physical radio network system ( 21 ). The transmission takes place with the aid of a special gateway unit ( 22 ), wherein the gateway unit ( 22 )-listens to each or to a chosen mode of operation (DMO, TMO),-receives the transmission occurring in one mode of operation (TMO, DMO), and-transmits the received transmission to the other mode of operation (DMO, TMO). The gateway unit ( 22 ) is formed of two terminal devices ( 12.1, 12.2 ) supporting each mode of operation, and whose data transfer interface ( 23.3*, 23.3 ') have an audio input (AUDIO In) and output (AUDIO Out) as well as a receiving indication output (RX On) and a transmission connection input (PTT). The terminal devices' ( 12.1, 12.2 ) receiving indication output (RX On) is connected to the other terminal device's ( 12.2, 12.1 ) transmission connection input SIT), and wherein the terminal devices' ( 12.1, 12.2 ) audio output (AUDIO Out) is connected to the other terminal device's ( 12.2, 12.1 ) audio input (AUDIO In).
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