Palm Treo 700p User Manual page 194

Note:
Terminating a Bluetooth DUN Internet Session
On your computer, right-click the icon or option representing your device,
and then click Disconnect.
182 Section 3F: Using Bluetooth® Wireless Technology and Dial-Up Networking
When a Bluetooth DUN connection is active, you cannot form a
partnership with another device or discover another device. You also
cannot send or receive information wirelessly directly from your device,
browse the Web, or send or receive email messages, and any scheduled
automatic email retrievals do not take place. Incoming calls are
automatically sent to voicemail. You can make outgoing calls, but the
DUN session will be terminated when you place the call.