Palm Treo 700p Getting Started Manual page 103

Temporary enables Bluetooth devices that are not on your Trusted Device list to
request a connection with your device during the next two minutes. Your device
reverts to the Hidden setting and becomes inaccessible to other devices after two
minutes.
Important:
Hidden allows only devices with which you have previously formed a partnership
to request a connection with your Treo device. New devices cannot request a
connection.
Wireless
For your Treo device to be visible to other Bluetooth devices, the
Bluetooth setting must be set to On, and visibility must be set to Visible
or Temporary. Your Treo device screen does not need to be turned on. If
you are requesting a connection with another device, or if you are
accepting a request from a trusted device, your Treo device can be set to
any of the Visibility options.
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