Abstract: A method is provided for correlating various charge data sets (CDR), which are produced in various network nodes (SGSN; GGSN; MMS-Relay) using a packet switching MMS-service for GSM and/or UMTS. Charge identification data is transferred from a network node (GGSN) of the core network to a network node (MMS-Relay) of the MMS-service supporting external network (PDN) by an interface (Gi) in order to correlate the CDRs of the network nodes (SGSN; GGSN) of the core network and the network node (MMS_Relay) of the external network via the charge identification data. Also provided are a corresponding method which is carried out for the MMS-Relay and corresponding devices and software programs.

Abstract: A method, apparatus and software program are provided for message transmission between telecommunications network elements which are involved in MMS (Multimedia Service) services, which are distinguished in that messages are sent from an MMS relay to an SCP/CSE (Service Control Point/CAMEL Service Environment), and/or vice versa, via an interface (Ge*) using a CAP (CAMEL Application Part) protocol.