Elec Freaks Bluetooth Modem Manuel d'utilisateur télécharger pdf (Page 24)

22 Telephony (Cordless telephony, Modem, Headset service,…)

23 Information (WEB-server, WAP- server,…)

TABLE 1.2:MAJOR SERVICE CLASSES

[Ref #1 As defined in See Generic Access Profile, Bluetooth SIG]

2. MAJOR DEVICE CLASSES

The Major Class segment is the highest level of granularity for defining a

Bluetooth Device. The main function of a device is used for determining the major

Class grouping. There are 32 different possible major classes. The assignment of this

Major Class field is defined in Table1.3.

1 2 1 1 1 0 9 8 Major Device Class

0 0 0 0 0 Miscel laneous [Ref #2]

0 0 0 0 1 Computer (desktop, notebook, PDA, organizers,…)

0 0 0 1 0 Phone (cellular ,cordless ,payphone, modem,…)

0 0 0 1 1 LAN/Network Access point

0 0 1 0 0 Audio/Video (headset, speaker, stereo, video display, vcr …)

0 0 1 0 1 Periphereal (mouse, joystick, keyboards.…)

0 0 1 1 0 Imaging (printing, scanner, camera, display,…)

1 1 1 1 1 Uncategorized, specific device code not specified

X X X X All other values reserved

TABLE 1.3: MAJOE DEVICE CLASSES

[Ref #2:Used where a more specific Major Device Class is not suited (but only as

specified as in this document) .Devices that do not have a major class assigned can use

the all-1 code until’ classified’]

3. THE MINOR DEVICE CLASS FIELD

The’ Minor Device Class field’ (bits 7 to 2 in the CoD ), are to be interpreted only

in the context of the Major Device Class (but interpreted of the Service Class field).

Thus the meaning of the bits may change, depending on the value of the ’ Major Device

Class field’. When the Minor Device Class field indicates a device class ,then the

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Elec Freaks Bluetooth Modem Manuel d'utilisateur Page 24