Abstract: The user of a mobile telephone (10) interacts with an Internet server (22) using the browsing capability of the mobile telephone. If the user requests a real-time audio streaming service, the audio is delivered to the end user through the telephone system (12) using the voice telephony capability of the mobile telephone. For this, the mobile telephone (10) receives instructions which tell it to automatically make a telephone call to an assigned telephone number which is allocated to an audio gateway (28). The gateway is linked to the internet (20) and receives the internet audio, which it converts into a form suitable for interfacing to the telephony network. A pool of telephone numbers is allocated to the gateway (28). When an audio service is requested, a temporary association is made between an unassigned number in the pool and the requested service. The mobile telephone is then instructed to dial this newly associated number in order to connect the user to the requested service.