Communication Device

A communication device is a hardware device capable of transmitting an analog or digital signal over the telephone, other communication wire, or wirelessly.

A classic example of a communication device is a computer modem, which converts a computer's digital information to an analog signal for transmission over a telephone line. Similarly, a modem receives analog signals, and converts them to digital, for processing by the computer. This process is called modulation/demodulation, from which the modem gets its name.

Other examples of communication devices include a NIC (network interface card), Wi-Fi devices, and access points.

Communication device examples

Below is a full listing of all the different types of communications devices you may encounter when dealing with a computer.

Bluetooth devices

Infrared devices

Modem (over phone line)

Network card (using Ethernet)

Smartphone

Wi-Fi devices (using a Wi-Fi router); examples shown below.

Communication device errors

Any time a communication device encounters problems communicating with another device you may encounter a communication error. Below is a list of general steps that can be verified when this error is encountered.

If your communication device is using a wire, make sure it is firmly connected.

Make sure the proper drivers are installed and that no errors or conflicts are occurring with the driver and that the device is being detected.

If your communication device requires settings, make sure they're correct. For example, a network card will require the proper IP, DNS, and Subnet settings to establish a connection with the network and be able to find its route to other network devices.

Why do computers need communication devices?

A computer can work fine without a communication device. However, for a computer to communicate with other computers they need a communication device. For example, for your computer to connect to the Internet to view this web page it needed a communication device. Without a communication

device you'd have to use a sneaker net to transfer or share data between computers.

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