초록 ▼

The invention relates to a communication system comprising a station (2) for charge metering of a connection point. This station comprises a monitoring circuit (7) for detecting a request for a connection set-up from the connection point (3), either for establishing the absence of a message after a

The invention relates to a communication system comprising a station (2) for charge metering of a connection point. This station comprises a monitoring circuit (7) for detecting a request for a connection set-up from the connection point (3), either for establishing the absence of a message after a given period of time, or for evaluating the contents of a message that has arrived from the connection point (3) after the request for a connection set-up has arrived, and for rejecting the request for a connection set-up if invalid parameters of the connection point (3) are established.

대표청구항 ▼

[ We claim:] [7.] Station (2) for charge metering of a connection point (3), which station comprises a monitoring circuit (7) for:detecting a request for a connection set-up from the connection point (3),either establishing the absence of a message after a given period of time or evaluating the cont

[ We claim:] [7.] Station (2) for charge metering of a connection point (3), which station comprises a monitoring circuit (7) for:detecting a request for a connection set-up from the connection point (3),either establishing the absence of a message after a given period of time or evaluating the contents of a message that has arrived from the connection point (3) after the request for a connection set-up has arrived, andrejecting the request for a connection set-up if invalid parameters of the connection point (3) are established;one of said invalid parameters comprising an error message sent by an evaluation circuit to the connection point (3) upon the detection of the intrusion of an unauthorized terminal unit at the connection point.