| 摘要 |
To switch packet data in the ISDN D-channel via a digital exchange, the complex looping of a Frame Handler into the connection to perform OSI layer 2 and layer 3 functions is to be improved. For this purpose, a connection, based on destination information in the SET UP message, is set up by an OSI layer 3 control unit (SE3) between the two OSI layer 2 control units (SE1, SE2) of the exchange (VST), to which the data terminal equipment (DEE1, DEE2) can be connected. Direct packet data exchange then takes place between the OSI layer 2 instances without further involvement of the layer 3 instance. <IMAGE> |
