Operation Manual

244 Bluetooth
Bluetooth
Bluetooth is an open standard for high-performance technology and allows wire-
less communication between 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 un-
dergo a once-off discovery procedure.
Discoverability
When first enabling a connection to a Bluetooth device, this function must be
switched on
 Page 233.
The OpenStage is discoverable for other Bluetooth devices by default.
To prevent unauthorised access, we recommend deactivating discoverability
once you have enabled the connection to a new Bluetooth device.
Pairing
Pairing is the process used by two Bluetooth-enabled devices to "see" one an-
other and to "recognise" that they can exchange data. It is therefore used for
checking the access authorisation of a Bluetooth device in a Bluetooth 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 success
-
fully paired, no further access authorisation checks are necessary. In-
stead, each subsequent check uses the previously created connection
key.