Airlogic ABM-400 Manual de usuario descargar pdf (Pagina 47)

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way facilitator of audio communication, and works directly with the Link Layer to assure the

special demands of synchronous voice traffic are met.

This last layer of the protocol stack is not defined by the Bluetooth SIG in any way. This

layer of the stack is made up of the actual applications which would interact with the other two

layers of the Bluetooth stack Applications to fulfill the various usage models detailed above will

obviously be needed, and in fact are likely of most interest to casual enthusiasts. The SIG chose

not to define application programming interfaces (APIs), however, nor did it decide on any

specific application interface with the lower level protocols. These decisions were designed to

produce the most flexible development environment possible for Bluetooth applications.

The SIG chose not to define an API for any environment because it felt that a technology

interest group whose focus was not any one environment should not presume to know better than

developers for that environment. In this way, Linux, Windows, and Mac APIs will have to be

created by those who know the platforms best. This trust in the separate developer communities

will ensure that inappropriate or arbitrary decisions made by the SIG will not limit development

in the future.

Not having a specific interface between different levels of the protocol stack allows for freedom

of design. Several of the underlying protocols (RFCOMM and IrDA, for example) are intended

to allow backwards compatibility with pre-existing applications, as well as for new software to

be created for Bluetooth devices using "legacy" software models. New software for Bluetooth

may also be created by interfacing directly with the new Bluetooth protocols, such as the L2CAP

layer, the Link Manager, and the SDP. By giving the developers of Bluetooth applications a free

hand in deciding how to communicate between protocols, the SIG sidestepped restrictions that

may have discouraged an attempt to develop for the protocol stack.

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Airlogic ABM-400 Manual de usuario Pagina 47