for most data-only applications. In addition, the Wi-Fi network must provide seamless roaming between access points. Commercial service One of the attractions of VoWLAN is that it uses widely available Wi-Fi and as such can be used without involving a service provider (e.g. running a Skype client on a laptop connected to the internet over Wi-Fi). However, there are network operators who use this technology as part of their service offer, typically using Unlicensed Mobile Access to deliver voice service at home. Example's include T-Mobile @Home in USA, or Orange's UNIK service in France. Alternatives As noted above, in many contexts a femtocell, using cellular technology to connect to standard terminals, can be considered an alternative to VoWLAN. See also Local area network Mobile VoIP Voice over LTE References Wireless networking Voice over IP