A message transmitting device is a tool or technology used to send information from one location to another. This can include various forms of communication, such as telephones, radios, computers, and messaging apps. These devices convert messages into signals that can be transmitted over different mediums, like wires or wireless networks, enabling communication between individuals or groups. Examples range from traditional methods like telegraphs to modern digital platforms.
The most popular such device is the computer - the very device with which you asked that question, and with which I am answering it.
telegraph
it is passing or transmitting a message or information, to exchange ideas
a communication device
The three processes used by sender-receivers are encoding (converting information into a message), transmitting (sending the message through a chosen channel), and decoding (interpreting the message by the receiver).
a communication device
DSL
telephone
It's called a global multicast, and you're transmitting to all reachable nodes.
routers
routers
The light on your device may be blinking to indicate that it is receiving or transmitting data, or to alert you to a notification or a low battery.