136 Bluetooth
Bluetooth
Bluetooth is an open standard for high-performance technology and allows wire-
less communication between PCs, PDAs, mobile telephones, etc.
In contrast to infrared connections, Bluetooth does not require a visual contact
for communication purposes and can be used over distances of up to 10
meters.
To exchange data between Bluetooth-enabled devices, the devices need to un-
dergo a once-off discovery procedure.
Discoverability
When first enabling a connection to a Bluetooth device, this function must be
switched on
page 129.
The OpenStage is discoverable for other Bluetooth devices by default.
To prevent unauthorized access, we recommend deactivating discoverability
once you have enabled the connection to a new Bluetooth device.
Linking
Linking is the process used by two Bluetooth-enabled devices to "see" one an-
other and to "recognize" that they can exchange data. It is therefore used for
checking the access authorization of a Bluetooth device in a Bluetooth network.
To do this, a 128
Bit linking key is created for subsequent identification.
For information on how to configure OpenStage for connection to a Blue-
tooth device page 128.
A connection is established for devices that are already connected even if
the "Discoverable" function is deactivated.
Linking is only performed the first time contact is established between a
Bluetooth device and your OpenStage. If the Bluetooth device is success
-
fully linked, no further access authorization checks are necessary. Instead,
each subsequent check uses the previously created connection key.
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