One of the most exciting developments to come about from the new generation of wireless communications technologies is the idea of fixed-mobile convergence. Fixed mobile convergence or FMC describes the ability to integrate cellular and private network services allowing calls to be transparently handed off between them. While FMC is often portrayed as a mechanism to hand off calls between WiFi-based wireless LANs and cellular services, in reality the "fixed" element in FMC can be any private network, wired or wireless.
It is no secret that mobile cellular telephone service has revolutionized the way that people communicate. Millions of consumers have chosen to do without wired telephone service for their personal use, and for many business people, their cellular number has become their primary number. For enterprise users who must rely on both a wired office phone and cellular service, the ultimate combination would be a service where they could be reached on a single number regardless of where they are located, and their calls could be passed transparently passed between cellular and any other environment with no interruption in the connection.