The proliferation of Wireless LAN (WLAN) in the private, enterprise and public domains has reached a critical mass.

It is clear that voice communication is one of the key applications for use over this new technology, but that it also presents a challenge for well-established telecom operators in the fixed-line and mobile spaces.

By using a dual mode handset the end-user can choose between GSM and VoIP. As no new technical equipment is required by the operator, the service offers a fast time-to-market.