When an engineer makes use of a modem they consider the gadget as an intermediary between the info gear and the communication community. The computer known as the data termination gear and the modem is taken into account the information communication gear . DTE and DCE are terms which help a communication engineer visualize a communication system in a technology neutral manner. Using these terms, an engineer is prepared to visualize the orientation of the tools to the community. The schematic helps the communication engineer visualize the connection of all points of communication.