telegraph network A communication network. That is, several circuits connect a number of telegraph offices and users' telegraph equipment.
Form a communication network that can inform each other. It can be divided into two types: public telegraph communication network and subscriber telegraph communication network. Public telegraph means that the sender will send the telegram to the sender's telegraph office, which will turn the message into an electrical signal and transmit it to the receiver's telegraph office through the telegraph channel, and the receiver's telegraph will be sent to the receiver's hand. Telex refers to a service in which the telegraph user uses the machine equipment (usually teletype) installed at the designated place of the user to temporarily connect the circuit through the telegraph switch, and the connected user reports it by himself