Abstract text

To provide at least one piece of subscriber information regarding at least one group call to an interception unit from a network unit by way of a communication network, the network unit receives at least one piece of subscriber information regarding at least one group call from a further network unit following a request for this at least one piece of subscriber information. The network unit forwards the at least one piece of subscriber information regarding the at least one group call in at least one IRI ticket to the interception unit.