Below, you will find a number of features forIt is well known Bluetooth:
(1) Throughout the United States and even in Europe.frequency range of 2400 - 2,483.5 MHz with79 1-MHz RF frequency (Radio) channels: TheJapan 2.472 2.497 MHz with a frequency range23 1 - MHz RF channels.
2. A Bluetooth randomly hops 1,600 Data Archiveonce, the second between the 79 RF channels.
3. Each Bluetooth channel is divided into timeslots, each of which is, 625 microseconds long.
4. A Bluetooth piconet has one master and upseven slaves. The Master - is a transfer, eventime slots, while the slaves that the transfer of the oddtime slots.
5. Data can be integrated package of up to 2.745bits in length.
6. Currently, there are two types of data transferbetween devices - SCO (synchronous connectionoriented) and ACL (asynchronous connectionless).
7. In a Bluetooth piconet, there can be up tothree SCO links containing 64,000 bits per second.each one. To help avoid collisions and timeproblems, linkages, the SCO will use reservedslots created by master
8. Master can support up to three SCO linksor with one, two, or three slaves.
9. The slots are not reserved for the SCO links can bebe used ACL group.
10. One can have a master and slave ACLLink
11. ACL is a master or slave (pointpoint) or it broadcasts to all slaves.
12. The ACL slaves will only come when it has toIf the master is not required to masterto request that the ACL slaves will not transmitvoid.

These days, all communication technology faces the
issue of privacy and identity theft, with Bluetooth
being no exception.  Almost everyone knows that email
services and networks require security.  What users
of Bluetooth need to realize is that Bluetooth also
requires security measures as well.

The profile found in Bluetooth will describe how
the technology is used.  Profiles can be best
described as vertical slices through the protocol
stack.  It will define options in each protocol
that are mandatory for the profile.

The networking standards of Bluetooth will transmit
data via low power radio frequency.  Bluetooth
communicates on a 2.45 GHz frequency.  This very
band of frequency has been set aside by international
agreement for the use of industrial and medical
devices.

The technology of Bluetooth wireless is a short
range communications method intended to replace
the cables that connect portable or fixed devices
while maintaining the highest levels of security.

The key features offered by Bluetooth include
low power and low cost.  The specification in
Bluetooth defines a uniform structure for a wide
range of devices to communicate and connect with
one another.

The technology behind Bluetooth has achieved
global satisfaction such as enabled devices, almost
everywhere in the world.  Bluetooth devices will
connect and communicate without wires through
short range and networks known as piconets.

Each device will simultaneously communicate with
up to seven other devices within a single piconet,
meaning that each device can also belong to
several piconets simultaneously.  The piconets
are dynamically established as Bluetooth enabled
devices enter and leave the proximity of radio.

A fundamental to Bluetooth strength is the
ability to handle both data and voice transmissions
simultaneously.  This will enable users to enjoy
varieties of innovative solutions such as hands
free talking, printing and fax capabilities,
and other applications.

Specifications
Unlike other standards of wireless, the Bluetooth
specification gives product developers both a
link layer and application layer definitions,
which will help support data and voice applications.

Spectrum
The Bluetooth technology operates in the industrial
and scientific band at 2.4 to 2.485 GHz, using a
spread spectrum, frequency hopping signal. 

Interference
The adaptive frequency hopping of Bluetooth
technology was designed to reduce interference
between wireless technologies that share the 2.4
GHz spectrum.  Adaptive frequency hopping (AFH)
works well within the spectrum to take full
advantage of the frequency available.

AFH hopping allows for more efficient transmission
within the spectrum, which provides users with
greater performance even if they are using other
technologies along with Bluetooth. 

Bluetooth has a lot to offer with an increasingly
difficult market place.  Bluetooth helps to bring
with it the promise of freedom from the cables and
simplicity in networking that has yet to be matched
by LAN (Local Area Network).

In the key marketplace, of wireless and handheld
devices, the closest competitor to Bluetooth is
infrared.  Infrared holds many key features,
although the line of sight it provides doesn't go
through walls or through obstacles like that of the
Bluetooth technology.

Unlike infrared, Bluetooth isn't a line of sight and
it provides ranges of up to 100 meters.  Bluetooth
is also low power and low processing with an
overhead protocol.  What this means, is that it's
ideal for integration into small battery powered
devices.  To put it short, the applications with
Bluetooth are virtually endless. 

Disadvantages
Bluetooth has several positive features and one
would be extremely hard pressed to find downsides
when given the current competition.  The only real
downsides are the data rate and security.  Infrared
can have data rates of up to 4 MBps, which provides
very fast rates for data transfer, while Bluetooth
only offers 1 MBps.

For this very reason, infrared has yet to be
dispensed with completely and is considered by
many to be the complimentary technology to that
of Bluetooth.  Infrared has inherent security due
to its line of sight. 

The greater range and radio frequency (RF) of
Bluetooth make it much more open to interception and
attack.  For this reason, security is a very key
aspect to the Bluetooth specification.

Although there are very few disadvantages, Bluetooth
still remains the best for short range wireless
technology.  Those who have tried it love it, and
they know for a fact that Bluetooth will be
around for years to come.

Bluetooth is a high speed, low powered wireless link
technology that's designed to connect phones or other
portable equipment together with little to no work
required by the user.  Unlike infrared, Bluetooth
doesn't require line of site positioning to work.

Current prototype circuits are contained on a board
that is 0.9 cm square, with a much smaller circuit
board being developed. 

When one Bluetooth device comes in contact with
another, they will automatically exchange addresses
and details of capability.  Then, they can establish
a 1 MB link with security that they will use as
required.  The protocols involved with handle both
data and voice, with a very flexible topography.

The technology achieves its goal by embedding tiny,
non expensive short range tranceivers into the
devices available today.  The radio operates on the
2.45 GHz frequency band, and supports up to 721
KBps, along with three voice channels. 

Each devices offers a unique 48 bit address from
the IEEE 802 standard, with the connections being
point to point or multipoint. The max range is
10 meters, although it can be extended to 100
meters by increasing the power.  The devices are
also protected from radio interference by changing
their frequencies, also known as frequency hopping.

What's important, is the fact that Bluetooth
devices won't drain battery life.  The specification
targets power consumption of the device, limiting
the drain on the battery.  The radio chip will
consume only 0.3mA in stand by mode, which is less
than 5% of the power that standard phones use.

Bluetooth will also guarantee security at the bit
level.  The authentification is controlled by the
user via a 128 bit key.  The radio signals can
be coded with anything up to 128 bit.  With the
frequency hopping, Bluetooth is already very
hard to listen into.

The baseband protocol is a combination of both
circuit and packet switches.  Slots can be reserved
for synchronous packets as well.  Each packet
will be transmitted in a different hop frequency.
Normally, a packet covers a single slot although
it can be extended to cover up to five slots.

Bluetooth can also support data channels of up to
three simultaneous voice channels.  Therefore,
it's possible to transfer the data while you talk
at the same time.  Each individual voice channel
will support 64 KB.

From a technical standpoint, Bluetooth is very
different indeed.  It's the best wireless method
in the world, surpassing even infrared.  For
communication on the go, Bluetooth is indeed
very hard to compete with.