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The Baseband, LMP and L2CAP are the OSI layer 1 and 2 Bluetooth protocols. RFCOMM is the Bluetooth serial port emulation entity. SDP is the Bluetooth Service Discovery Protocol.
Compatibility to v1.1 or later Core Specification is required.
Hands-Free control is the entity responsible for Hands-Free unit specific control signaling; this signaling is AT command based.
Although not shown in the model to the left, it is assumed by this profile that Hands-Free Control has access to some lower layer procedures (for example, Synchronous Connection establishment).
The audio port emulation layer shown in the figure to the left is the entity emulating the audio port on the Audio Gateway, and the audio driver is the driver software in the Hands-Free unit.
For the shaded protocols/entities in the figure to the left, the Serial Port Profile is used as the base standard. For these protocols, all mandatory requirements stated in the Serial Port Profile apply except in those cases where this specification explicitly states deviations. |