Wednesday, January 4, 2012

Bluetooth Specs





Under, you may discover a number of specs for the
well known Bluetooth:

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1. Throughout the United States and even Europe,
the range of frequency is 2,four hundred - 2,483.5 MHZ, with
79 1-MHz RF (radio frequency) channels. The
frequency range in Japan is 2,472 to 2,497 MHz with
23 1-MHz RF channels.

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2. An information channel of Bluetooth randomly hops 1,600
instances per second between the 79 RF channels.

3. Every Bluetooth channel is split into time
slots, with every one being 625 microseconds long.

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4. A Bluetooth piconet has one master and as much as
seven slaves. The master will transmit in even
time slots, while the slaves will transmit in odd
time slots.

5. The data in a single packet may be as much as 2,745
bits in length.

6. Currently, there are two forms of information switch
between devices - SCO (synchronous connection
oriented) and ACL (asynchronous connectionless).

7. In a Bluetooth piconet, there may be as much as
three SCO links containing sixty four,000 bits per second
with each one. To help keep away from collision and timing
problems, the links of the SCO will use reserved
slots set up by the master.

8. A master can support as much as three SCO links
with both one, two, and even three slaves.

9. The slots not reserved for the SCO links can
be used for ACL links.

10. A single master and slave can have one ACL
link.

11. ACL is both master to one slave (level to
level) or it broadcasts to all of the slaves.

12. The ACL slaves will solely transmit when it has
been requested by the master. If the master would not
make the request, the ACL slaves will not transmit
something at all.




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