Bluetooth Wireless Networking

Bluetooth technology offers three different types of defined ranges, based on output ranges. Class 1 devices are the most powerful, as they can have up to 100 mW of power, with a regular antenna giving them a range of around 130 - 330 feet.

The class 2 devices are lower power, offering up to 2.5 mW of power. A regular antenna will give them a range of around 50 - 100 feet. Class 3 devices use even less power, up to 1 mW of power to be exact. With a regular antenna, they will have a range of around 16 - 33 feet.

Even though you may not realize it, Bluetooth wireless technology has never been intended for anything other than short distance types of communication. With Bluetooth wireless, the short range is actually a benefit.

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Features of the Motorola A630 GSM Bluetooth Cell Phone

The unique Motorola A630 GSM Bluetooth cell phone combines a sophisticated style in its attention-grabbing design and powerful connectivity features that modern living demands. Some of the main features of the Motorola A630 GSM Bluetooth cell phone, aside from the obvious Bluetooth technology, include a built-in antenna and VGA camera.

The small and sleek Motorola A630 GSM Bluetooth cell phone is not just a stylish handset. A close look would reveal that it is a flip phone. The Motorola A630 GSM Bluetooth cell phone has a typical keypad and a small screen on its outside but behind the screen is a wide display and a full-text 5-way navigating thumb pad.

This phone has a variety of features such as a complete QWERTY keyboard for quick messaging and a landscape-format color display (176 x 220 pixels). Set the phone flat and then open the hinge on the front to view the landscape color display, which is designed for quick Internet chatting, playing games, or sending POP3 emails.

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Key Learning Points Of Bluetooth

Bluetooth is easily the best in wireless handheld technology. When it comes to learning, Bluetooth can get quite complicated. To help you, you'll find the key learning points of Bluetooth below:

1. Bluetooth is an energy efficient, low overhead communication protocol that's ideal for interdevice communications.
2. Unlike infrared, Bluetooth doesn't require a line of sight.
3. Depending on the implementation, Bluetooth can have a range of up to 100 meters.
4. The specification of Bluetooth consists of a Foundation Profile Document and a Foundation Core Document.
   

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The Bluetooth Solution

The technology of Bluetooth will take small area networking to the next level by removing the need for user intervention and help keep transmission power very low to preserve battery power. Each transmission signal to and from your cellular phone will use just 1 mw of power, giving you
plenty of space on your battery to talk.

Bluetooth is a networking standard that will work on two levels:

1. It will provide agreement at the physical level, as Bluetooth is a radio frequency standard.
2. It will provide agreement at the level of protocol, where products will have to agree on when bits are sent, how many are sent, and how the parties in conversation can be sure the message recieved is the same one that was sent.

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The Future Of Bluetooth

Because it meets the basic needs of connectivity in close range, Bluetooth has a very bright future ahead of it. Bluetooth is actually the result of initiatives from nine leading communications and computer industry giants, including 3-COM, Sony, Lucent, IBM, Nokia, Microsoft, etc.

Since the forming of the original group, more than 1,800 manufacturers around the world have joined the initiative. According to reports, the Bluetooth technology is expected to be built into more than 100 million devices, with over 670 million enabled Bluetooth devices.

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How Bluetooth Works

Bluetooth devices will normally operate at 2.4 GHZ in the license free, globally available ISM radio band. The advantage to this band includes worldwide availability and compatibility. A disadvantage to this however, is that the devices must share this band with other RF emitters. This includes automobile security systems, other wireless devices, and other noise sources, such as microwaves.

To overcome this challenge, Bluetooth employs a fast frequency hopping scheme and therefore uses shorter packets than other standards within the ISM band. This scheme helps to make Bluetooth communication more robust and more secure.

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Bluetooth Specifications

Below, you'll find several specifications for the well known Bluetooth:

1. Throughout the United States and even Europe, the range of frequency is 2,400 - 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.
2. A data channel of Bluetooth randomly hops 1,600 times per second between the 79 RF channels.
3. Each Bluetooth channel is divided into time slots, with each one being 625 microseconds long.
4. A Bluetooth piconet has one master and up to seven slaves. The master will transmit in even time slots, while the slaves will transmit in odd time slots.

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Using Bluetooth

The amazing technology of Bluetooth presents a great way of exchanging data between two wireless devices. Unlike telephones, there are no wires or messy leads to worry about. You can enjoy wireless communications with short distances of up to thirty feet.

Bluetooth also offers interoperability, meaning that you can use your portable Bluetooth device to connect with existing Bluetooth points. This way, you won't have to carry a data lead or CDs of drivers around with you everywhere you go. You can enjoy the best of wireless without having to worry about installing your software.

With today's Bluetooth, you can use your PDA and cell phone to surf the net or check emails as you travel. If you are in the business field, this can be very beneficial, especially if you like to check your email throughout the day. Bluetooth will enable you to check your email no matter where you are - which is great news for those who like to travel.

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