NetMotion Wireless, which has developed software that allows users to continue to work even when not connected to a wireless network, said today that Cingular Wireless will start to sell the product for Windows-based devices.

In addition to allowing people to work offline, the software also serves as a mobile virtual private network that provides additional security. The features could be particularly useful for law enforcement, fire personnel, paramedics and home healthcare nurses, the Cingular said.

"Cingular's new Mobility XE(tm) solution from NetMotion Wireless eliminates the risk of having applications interrupted and data lost, particularly when responding to emergency situations," said Laura Johnson, Cingular's senior director of enterprise solutions.

The software will be available through Cingular's direct sales organization, which serves 1,800 federal, state and local government agencies.

In June, NetMotion announced that it was buying Bethlehem, Pa.-based Padcom after the company had won a patent-infringement suit against NetMotion. NetMotion Wireless was spun off from WRQ in 2001.