| 摘要 |
<p>The present invention relates to a TETRA system which comprises a mobile exchange (DXT), a subscriber station (1) for which a subscriber-station-specific TEI serial number is determined and which comprises means for establishing a connection to a second subscriber station (2) via the mobile exchange (DXT), or alternatively, on a direct-mode channel, and a base station (TBS1) having a data transmission connection to the mobile exchange (DXT) and comprising means for receiving the TEI serial number transmitted by said subscriber station (1) over the radio path and for forwarding the same to the mobile exchange (DXT). For more efficient management of the subscriber stations, the mobile exchange (DXT) is connected by means of a data transmission connection to an equipment register (EIR) which stores data on subscriber stations whose calls are to be handled in a predetermined manner. The mobile exchange (DXT) comprises means for transmitting the received TEI serial number to the equipment register (EIR). The equipment register (EIR) is arranged to check whether the TEI serial number received from the mobile exchange (DXT) is included in the data stored in the equipment register and to transmit a message indicating the result of checking to the mobile exchange (DXT).</p> |
