Bluetooth Babble Not all wireless gadgets speak the same language.

The vision: You're cruising the freeway in your office onwheels and need to call a client. You slip on your Bluetoothheadset and voice-dial your cell phone. Later, your phonewirelessly zaps the day's contacts to your PC or printer.

Unfortunately, in real life, it's seldom that simple. Notall Bluetooth gadgets seem to speak the same dialect, says Gartner Inc. researchdirector William Clark--not without some fiddling on your part.

Gartner estimates that businesses will spend $70 per employeeper year working out the handshake and security settings ofBluetooth devices. Instead of supporting the kind of independentinteroperability testing that, say, Wi-Fi radios get, Bluetoothmanufacturers occasionally hold "unplug fests" to ferretout incompatibilities.