LAS VEGAS--Motorola this week is unveiling at the International CES event a residential gateway that allows carriers to blend both traditional cellular service offerings with WiFi in the home while using the same device as a four-port router for high-speed Internet access.

The Residential Seamless Mobility Gateway (RSG) acts like a traditional 802.11 b/g access point. However, when consumers use a dual-mode handset in the home, the device picks up calls, coverts and transports them to an IMS gateway, typically residing in the landline carrier’s network. The network-based gateway then passes the call on to the PSTN or the cellular network.

“To the cellular network, that gateway is just another cell site,” said Jeff Walker, senior director of marketing for Motorola.

One of the unique features of the RSG is the ability to seamlessly transfer voice calls between the home wireless network and the cellular network. Additionally, calls that are made from a dual-mode phone inside the home can automatically be transferred over a VoIP service, assuming the user has subscribed.

In fact, one of the biggest gating factors to getting the fixed/mobile convergence market off the ground is establishing the business relationships that are necessary. Walker pointed to the recent alliance between Sprint Nextel and Comcast as a good example of how different types of carriers will need to come together.

Motorola expects to have two different versions of the RSG. The first, the RSG2500, will hit the market this winter. The RSG3500, which adds the ability to power two lines of primary VoIP telephone service within the home, will be available this summer.