One mobile handset that will deliver on the promise of convergence when it ships is Motorola's upcoming CN620 Dual-Network Mobile Office Device. Announced back in July, the CN620 is the result of a year-and-a-half collaboration between Motorola, Avaya and Proxim.

Avaya and Proxim provide the WLAN infrastructure equipment to support Motorola's mobile handset in a platform called the Converged Mobility Solution. Because the CN620 is part of this larger platform, you won't be able buy the mobile handset and have it seamlessly switch between a Wi-Fi and cellular network if the WLAN is not part of the enterprise with which the Converged Mobility Solution is deployed.

During a conference call for the launch of the Converged Mobility Solution, Chris White, Director of Business Development at Motorola, illustrated the system by example of a fictional scenerio where an employee using the new CN620 on a train to make a virtual private network connection to the office to get a number, making the call, and then walking into work while still on the phone and having the call switch from GSM to the WLAN while still talking.

More on CN620
The CN620 Dual-Network Mobile Office Device (MOD) has the size and shape of a cellular phone but Motorola has installed a user interface including 9-way navigation disc controller and other buttons for easy access to enterprise phone functions such as hold, mute, and speakerphone.

The screen on the CN620 will use color coding to indicate when it is connected to a metered GSM connection (forest green) or the unlimited WLAN (plum). There's full WAP and HTML-based access for Web browsing, and the phone can synchronize with data stored on PCs.