A communication device is a hardware device capable of transmitting an analog or digital signal over the telephone, other communication wire, or wirelessly. The best example of a communication device is a computer Modem, which is capable of sending and receiving a signal to allow computers to talk to other computers over the telephone. Other examples of communication devices include a NIC (network interface card), Wi-Fi devices, and access points
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.