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The Baseband, LMP and L2CAP are the OSI layer 1 and 2 Bluetooth protocols. RFCOMM is the Bluetooth adaptation of GSM TS 07.10. SDP is the Bluetooth Service Discovery Protocol. Headset Control is the entity responsible for headset-specific control signalling; this signalling is AT command based.
Note: although not shown in the model to the left, it is assumed by this profile that Headset Control has access to some lower layer procedures (for example, SCO link establishment).
The audio port emulation layer shown in the figure to the left is the entity emulating the audio port on the cellular phone or PC, and the audio driver is the driver software in the headset.
For the shaded protocols/entities in the figure to the left, the Serial Port Profile is used as base standard. For these protocols, all requirements stated in the Serial Port Profile apply except in those cases where this profile explicitly states deviations. |