Wireless Armenia

While using computers, entertainment systems or telephones, different parts and components of the system are devices of electronic community. These devices communicate with each other by the variety of wires, cables, radio signals and infrared light beams, and an even greater variety of connectors, plugs and protocols.
There are several ways by which electronic devices can be connected with each other. For example:
Component cables
Electrical wires
Ethernet cables
WiFi
The infrared signals
The process of connecting things is becoming more and more common. Here we will discuss how to connect devices of Bluetooth, which can streamline the process. Bluetooth connection is wireless and automatic, and it has some interesting things that can simplify our daily lives.
Problem
If any two devices need to connect to each other, they should agree on several points before the conversation can start . The first point of agreement is physical: will they talk over wires or through some form of wireless signals? If they use cabels, how much you want to – one, two, eight, 32? As soon as the physical attributes decided different questions arise:
How much information will be sent at that time? For example, serial ports, data 1 bit at a time, while parallel ports send multiple bits at once.
How will they talk to each other? All parts of the discussion should be aware that bit means and whether or not the message that they receive the same message that was sent. This means developing a set of commands and responses known as the protocol.

In all wireless networking technologies , security is important. Devices can easily grab radio waves from the air, so that people who send information over a wireless connection have to take warnings to ensure that these signals are not intercepted. Bluetooth technology is not different – it’s wireless and therefore susceptible to spying and remote access, as well as Wi-Fi, if the network is not secure. With Bluetooth, however, the automatic nature of the relationship, which is a huge advantage in terms of time and effort, is also an advantage for those who want to send you information without your permission.
Bluetooth gives many security modes, and device produces determine which mode to include in a Bluetooth-enabled gadgets. Nearly in all cases, users of Bluetooth can establish “trusted devices” that can exchange information without demanding permission. When other device tries to connect the gadget, the user must decide whether to make it or not. Service-level security and device-level security are working together to protect Bluetooth devices from unauthorized information transfer. Security methods include authorization and identification procedures that limit the use of Bluetooth services registered user and require users to make a reasonable decision for opening the file or accept the information. As these measures are involved in the user’s phone or in other device, unauthorized access is unlikely. The user can also just switch his Bluetooth mode ” invisible ” and avoid connections with other Bluetooth devices entirely. If you use Bluetooth network primarily for synchronizing devices in the home, it may be a good way of avoiding from any possibility of a security breach while in public places.
However, early cell phone virus writers have used an automated process of the Bluetooth connection to send infected files. Since many cell phones use a secure connection of Bluetooth, which requires authorization and authentication before taking information from the unknown device, the infected file can not be taken from very far. When the virus enters the cell phone user, the user must agree to open it and then agree to install it. This, so far, prevents most cell phones from viruses that gives much damage.

Bluetooth has a small area for  networking  to another side  by eliminating the need for user intervention and to maintain an extremely low power to conserve battery power. Imagine that you are on your Bluetooth-enabled cell phone, standing next the door of  your house. You say the man at the other side  to call you back after  five minutes, so you can go in your house  and put your things away. While  you enter to your house the map that you received on your mobile from your car’s Bluetooth-enabled GPS system is automatically sent to your  Bluetooth-enabled computer, because your mobile  has already  taken  the Bluetooth signal from your computer and automatically sent the data that you intended for  transfer . After five minutes, when your friend again calls you, your Bluetooth-enabled home phone rings instead of your mobile .The  person called the same number  by the same number, but your home phone picked up Bluetooth signals from mobile and automatically redirects the call, because it  knew   that you are  at home. And each transmission signal to your mobile  and from your mobile phone consumes just 1 MW of power, so that your mobile phone charge is virtually independent of all this activity.

From the beginning, Bluetooth is a networking standard that works on two levels:
• Ensures agreement at the physical level – Bluetooth is a radio frequency standard.
• It provides agreement at the protocol level, where products have to agree on when bits are transmitted, how many will be sent at a time, and as part of a conversation can be sure that the message is the same as the message sent.
The biggest advantage of Bluetooth is  that it is wireless, inexpensive and automatic. There are other ways to get around using wires, including infrared. Infrared (IR) refers to light waves of low frequency than human eyes can receive and interpret. Infrared is used in most remote control systems. Infrared communications are fairly reliable and do not cost a lot to be built into the device, but there are a couple of drawbacks. First, infrared is a “line of sight” technology. For example, you must specify the remote at the TV or DVD player to make things happen. A second drawback is that infrared is almost always “one to one” technology. You can transfer data between your desktop and laptop, but not  your laptop and PDA at the same time. (See how remote control works for  learning  more about infrared link.)
These two qualities of infrared are actually advantageous in some things. Because infrared transmitters and receivers must be aligned with each other, interference between devices is uncommon. Of course  nature of infrared communications is useful in that you can be sure that the message goes only to the recipient, even in a room full of infrared receivers.
Bluetooth is designed to circumvent the problems that comes  with infrared systems. Older Bluetooth 1.0 standard maximum transmission rate of 1 MB per second (Mbps), while Bluetooth 2.0 can manage up to 3 Mbps. Bluetooth 2.0 is backward compatible with 1.0 devices.
Let’s find out how Bluetooth-network works.
Why is it called Bluetooth?
Harald Bluetooth was king of Denmark at the end of 900. He succeed  to unite Denmark and part of Norway into one kingdom then  disseminated Christianity in  Denmark. He left a large monument, Jelling rune stone, in memory of his parents. He was killed in 986 during a battle with his son, Svend Forkbeard. The choice of this name for the standard indicates how important companies from Scandinavia (countries, including Denmark, Sweden, Norway and Finland) have the communications industry, even though he says little about how the technology works.