Wireless device and network with improved functional architecture

A wireless communications network comprising;

• a plurality of base stations configured to communicate with at least one mobile terminal;
• a gateway configured to deliver communications from the mobile terminal to the public switched telephone network;
• a session control system configured to control communications with the mobile terminal over a public network;
• and
• a call accounting system configured to control communications with the mobile terminal over a public network.

A method for enabling wireless communications, comprising;

• receiving, in a base station, an internet-protocol communications request from a wireless device;
• transmitting an authorization request corresponding to the internet-protocol communications request, over a public network, to a wireless carrier authorization server;
• receiving a service authorization corresponding to the communications request from the wireless carrier authorization server;
• and
• enabling voice-over-internet-protocol communications between the wireless device and the public network.