Call routing via a service provider such as a Voice-over-IP service provider whereby a cellular call is established between the originating mobile device and the service providers access point

摘要

The application relates to a method of establishing communications between a mobile cellular communications device arid a remote communications endpoint via a Voice-over-IP service provider in order to save costs for international telephone calls.
in the prior art Voice-over-IP call through is a two-stage process comprising dialling a local number, entering a PIN and then dialling the destination number. However, such a two-stage process is inconvenient. This problem is solved in that an application executed on the mobile cellular communications device decides whether to process the dialled telephone number as an normal call or to use the Voice-over-IP service provider to process the call. In the later case, the dialled telephone number is provided (7) to an authentication server (270) which upon successful authentication sends (8) the dialled telephone number to the service provider's call floor platform (230) and returns (9) a service provider access number to the mobile device (240). The mobile device automatically dials the access number (10) to connect to the service provider's call floor platform which forwards (11) the call to the dialled telephone number, e.g. via voice-over-IP.