The present invention is concerned with a process for determining communication identifiers for communication devices connected over a network, which have start identifiers assigned to them, as well as with a communication device and a communication module therefor. The membrane can be oleophobic or oleophilic and preferably includes expanded polytetrafluoroethylene. An IMS media codec negotiation system is also provided by the present disclosure. Thereby a pattern formed on a reticle is transferred onto the divided area on the wafer via the projection optical system. Once the database has been updated, the update icon only is refreshed indicating that the database has been successfully updated.