| 摘要 |
<p>The invention relates to the field of data transmission in a network of distributed stations. In this case, the network contains a network connection switching unit which sets up desired connections between network subscriber stations arranged in a star formation. The network system under consideration has provision for network stations to log on in the network using a logon message and to log off using a logoff message. Regular turn-on and turn-off operations allow these logon and logoff messages to be sent. One problem is that when the network cable for a network station is manually decoupled from the network connection switching unit (11) the decoupled network station is no longer able to transmit the proper logoff message. The invention solves the problem through additional means in the network connection switching unit. These detect the decoupling of a network station. The detection means then initiate the automatic sending of the proper logoff message by the network connection switching unit. To this end, the network connection switching unit records all information about the individual network stations which is required for generating a proper logoff message.</p> |
