AirWalk's new "EdgePoint Pro" Enterprise Femtocell neatly encapsulates the differences between a femtocell that's suitable for the home, and one that's suitable for business users.
The AirWalk Edge Pro is 3G: Most home basestations are simply 2G devices used to improve cell coverage in a user's dwelling. The Edge Pro supports both CDMA 1xRTT and 3G EV-DO for calls and data coverage. This won't be a differentiation point between home and business femtocells for long, however, as AT&T Inc. (NYSE: T) plans to soon introduce its 3G "microcell" for consumers. (See Cisco Femto Spotted at AT&T.)
The Edge Pro can handle more users: The biz box can support up to 28 users at one time, according to AirWalk. Most consumer-grade femtos are designed to support just a handful of users concurrently. (See Femtos Mean Business for Orange.)
Business casual: The AirWalk box is a flat gray unit that bolts onto a wall. Quite different from the way vendors are designing consumer femtocells into everything from set-top boxes to digital picture frames.

Meanwhile, WiFi networks have been supporting VOIP in business environments for a couple of years, and many more handsets now support WiFi.
— Dan Jones, Site Editor, Unstrung