Beneath, you will find several specs for the
well known Bluetooth:
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1. Throughout the United States and even Europe,
the vary of frequency is 2,400 - 2,483.5 MHZ, with
79 1-MHz RF (radio frequency) channels. The
frequency vary in Japan is 2,472 to 2,497 MHz with
23 1-MHz RF channels.
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2. A data 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 each 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, whereas the slaves will transmit in odd
time slots.
5. The information in a single packet could be as much as 2,745
bits in length.
6. At present, there are two forms of data switch
between units - SCO (synchronous connection
oriented) and ACL (asynchronous connectionless).
7. In a Bluetooth piconet, there could be as much as
three SCO hyperlinks containing sixty four,000 bits per second
with every one. To help avoid collision and timing
problems, the hyperlinks of the SCO will use reserved
slots arrange by the master.
8. A master can help as much as three SCO hyperlinks
with either one, two, or even three slaves.
9. The slots not reserved for the SCO hyperlinks can
be used for ACL links.
10. A single master and slave can have one ACL
link.
11. ACL is either master to at least one slave (level to
level) or it broadcasts to all of the slaves.
12. The ACL slaves will only 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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