A management unit for managing a channel in a telecommunications network includes a registering section configured to define and register a visibility attribute associated with a first channel, belonging to a first session, for accessing a service in the telecommunications network. A receiving section is configured to receive a request to obtain information on the first channel from a second channel. The second channel belongs to the first session or a second session for accessing the service. A sending section is configured to determine and send a response to the request to obtain information on the first channel, taking into account the visibility attribute associated with the first channel, and further taking into account whether the second channel belongs to the first session or the second session.