Communication Devices
08:42Communication Devices Definition
A communication device is piece of equipment or hardware designed to move information or data from one place to another, in other words, allowing one computer device to communicate with another.
Communication Devices Example !
❈ Bluetooth Devices
Bluetooth is a computing and telecommunications industry specification that describes how devices such as mobile phones, computers, or personal digital assistants can communicate with each other.
Bluetooth is an RF technology that operates at 2.4 GHz, has an effective range of 32-feet (10 meters) (this range can change depending on the power class), and has a transfer rate of 1 Mbps and throughput of 721 Kbps.
❈ Infrared Devices
Method of transferring data without the use of wires. A common example of an infrared (Ir) device is a TV remote. However, infrared is also used with computers with devices such as a cordless keyboard or mouse. The picture is an example of the Nintendo Wii remote and a good example of an infrared device.
❈ Modem
A Modem or Broadband Modem is a hardware device that connects a computer or router to a broadband network. For example, a Cable Modem and DSL Modem are two examples of these types of Modems.
A Modem is a hardware device that allows a computer to send and receive information over telephone lines by converting digital data into an analog signal used on phone lines. In the picture below, is an example of an internal expansion card Modem. Click the image to get a description about each of the components found on the card.
Internal Computer Modem Expansion Card
Modems are referred to as an asynchronous device, meaning that the device transmits data in an intermittent stream of small packets. Once received, the receiving system then takes the data in the packets and reassembles it into a form the computer can use.
❈ Wi-Fi
Short for Wireless Fidelity, Wi-Fi utilizes one of the IEEE 802.11 wireless standards to achieve a wireless connection to a network. A home wireless network uses a wireless access point or router to broadcast a signal using WAP or WEP encryption to send and receive signals from wireless devices on the network. The picture shows a Wireless access point with two antennas and an example of how most home users connect to the Internet using a wireless device.
If the desktop computer or laptop does not have wireless, it requires a wireless adapter to connect to the wireless network. Below are examples of the different Wi-Fi adapters that can be used with a computer to connect to a wireless network.
In the picture above, the first image is of a Linksys desktop Wi-Fi card that connects to a PCI slot on the motherboard. Next, the SMC wireless PC Card is used with older laptops that do not have a wireless option. Finally, the far right image is of a Cisco USB Wi-Fi adapter that can be used on any computer with a USB port to connect to a Wireless network.
Examples of devices that use Wi-Fi
Today, there are a number of devices that connect to the Internet using Wi-Fi. Below is a short list of some of the more popular Wi-Fi devices you may find in a home or office. Also, see our wireless definition for a list of other wireless devices that use a different spectrum to communicate wirelessly.
- Computers
- Digital Photo Frames
- DVD or Blue-Ray Player
- Printer
- Smart TV
- Smartphones
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