A wireless communications technology that allows the use of transponders to send and recieve data/voice over a large geographic area. It divides the region into overlapping cells with a radius of only a few miles. When a cellular phone travels from one cell to another the caller is "handed off" to the next cell without loss of signal. Adjoining cells well never have the same channel (832 max for analog, roughly 3x for digital) frequencies lowering the chance of a dropped call.