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Chongqing Jinou Science &Technology Development Co., Ltd.
http://www.oemblue.com/ [e-mail]
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Any reserved but otherwise unassigned bits, such as in the Major Service Class field, should be set
to 0.
Figure 1.2: The Class of Device/Service field (first format type). Please note the order in which
the octets are sent on the air and stored in memory. Bit number 0 is sent first on the air.
12.2 MAJOR SERVICE CLASSES
Bit no
Major Service Class
13
Limited Discoverable Mode [Ref #1]
14
(reserved)
15
(reserved)
16
Positioning (Location identification)
17
Networking (LAN, Ad hoc, ...)
18
Rendering (Printing, Speaker, ...)
19
Capturing (Scanner, Microphone, ...)
20
Object Transfer (v-Inbox, v-Folder, ...)
21
Audio (Speaker, Microphone, Headset service, ...)
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]
12.3 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 to determine the major class grouping. There are 32 different possible
major classes. The assignment of this Major Class field is defined in Table 1.3.
12
11
10
9
8
Major Device Class
0
0
0
0
0
Miscellaneous [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
Peripheral (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
X
All other values reserved
TABLE 1.3: MAJOR DEVICE CLASSES
[Ref #2: Used where a more specific Major Device Class code is not suited (but only as specified
in this document). Devices that do not have a major class code assigned can use the all-1 code until
'classified']
12.4 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 independent 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 primary device class should be reported, e.g. a cellular phone that can
also work as a cordless handset should use 'Cellular' in the minor device class field.
12.5 MINOR DEVICE CLASS FIELD - COMPUTER MAJOR
CLASS