What is the return channel?

Return channel or return to return is the direction of the link that is against the main flow of information. It is used in analog and digital communication to signal the remote end of the communication connection. The return channel is sometimes referred to as a reverse channel or rear channel that provides status and supervision capabilities to the user terminal.

In a typical broadband transmission connection used in communication circuits, it must be ensured that the main data flow is successfully collected by incoming data. It is similar to narrators who constantly tell the story as long as there are any signs of confirmation from the listener, for example, when someone in the audience occasionally nods or gives a short positive response. The return channel is the direction of communication from the user back to the source. For systems with backhaul requirements, it is necessary to confirm the active state of the nodes in both directions. In the global mobile phone infrastructure, the data is equal to the switching nodes corresponds to many types of channels that can carry the main data streamsor can carry information about management and supervision.

There is a wide range of uses for the return channel in satellite, remote controls, data communication links and many more. For example, for satellite images, the return channel provides the path to sending commands to relocate the imaging satellite to optimize the visual coverage of a slightly shifted geographical area. In the robotic exploration unit, the front channel can contain a digitized seabed video where oil leakage is monitored. The return channel can carry digital packets that pass through the robot on the seabed and can carry commands for scrolling and focusing the camcorder.

Links to communication

Data communication uses return channels that can be automatically used by different data of Commuprotocoly about anywhere. If two computers are connected to data transfer, the channel from the data target computer signals the status of the currentabout the transmission. In early computer communication it was the equivalent of transmission to (Xon) and broadcast (XOFF) stimulating scheme, where each of these conditions was signaled by a single 7 -bit character. For example, on a computer for a printer, the printer can keep the data flow from the computer, even if the printer is unable to catch up at some point. This is typical when the printer runs out of paper or memory for balancing pages.

In the above state, the printer sends XOFF to a computer that causes the computer to stop sending additional data. When the printer is ready, Xon will send. At this point, the computer will restore data sending to the printer. The printer calculation channel can be considered a return channel.