Voice and text data service for mobile subscribers.

摘要

Method and intelligent subscriber management unit for enabling voice and text data service from a public communication network (7) to a mobile subscriber device (1). Authenticating the mobile subscriber device (1) is achieved using a home location register (8) and/or authentication center (9), while the mobile subscriber device (1) is in reach of an access point (2) of a data network (3). A challenge response is received from a subscriber identity module (SIM) of the mobile subscriber device (1), and includes the international mobile subscriber identity (IMSI (16)). The IMSI (16) is stored in a visitor location register (17) which is attached to the home location register (8). Then conversion ofvoice and text data service is executed between a first data format suitable for the public communication network (7) and a second data format suitable for the data network (3).