Abstract: In various embodiments, a mobile device connected to a cellular network performs a credential exchange with a telephone not connected to an Internet Protocol (IP) network. The mobile device relays, via the cellular network, registration information between the telephone and a telephony interconnect service, based in part on the credential exchange. The mobile device receives an indication of a telephone call associated with a user of the mobile device. The mobile device proxies, via the cellular network, the telephone call between the telephony interconnect service and the telephone.

Abstract: A mobile telecommunications network operable to provide data services to a mobile device serviced thereby comprising a first service node, a base station subsystem operable to transmit data to the first service node and receive data from the first service node, the first service node operable to receive a first packet, read a first service marking included therein, perform a first increment to a counter in a first traffic volume container dedicated to a service associated with the first service marking is provided. A node of the network for performing billing procedures on call detail records is also provided. A method of levying a tariff for data delivered from an originator to a terminal device in a telecommunication network comprising reading an identifier in a packet, determining a correspondence with the identifier and the originator of the data, and levying the tariff against the originator is provided.