Bluetooth
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Bluetooth
Bluetooth is an open standard for high-performance
technology and allows wireless communication be-
tween PCs, PDAs, and mobile telephones.
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 undergo a once-off discovery pro-
cedure.
Discoverability
When first enabling a connection to a Bluetooth device,
this function must be switched on  page 231.
The OpenStage is discoverable for other Bluetooth de-
vices by default.
To prevent unauthorized access, we recommend deac-
tivating discoverability once you have enabled the con-
nection to a new Bluetooth device.
Pairing
Pairing is the process used by two Bluetooth-enabled
devices to "see" one another and to "recognize" that they
can exchange data. It is therefore used for checking the
access authorization of a Bluetooth device in a Blue-
tooth network. To do this, a 128 bit link key is created
for subsequent identification.
A connection is established for devices that are
already connected even if the "Discoverable"
function is deactivated.
Pairing is only performed the first time contact is
established between a Bluetooth device and
your OpenStage. If the Bluetooth device is suc-
cessfully paired, no further access authorization
checks are necessary. Instead, each subsequent
check uses the previously created connection
key.
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