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Relay Increase The Transmission Distance Of The Data
Jul 12, 2017

Relay is a small invention, it is connected to the network line of a device, commonly used in two network nodes between the two-way physical signal forwarding work. Do you know the function of the Relay when using the Relay? Xiaobian below to tell you about what the function of the Relay?

In the field of long-distance communications, the Relay has the following meaning: 1. An analog device that enhances the input signal, regardless of the input signal type (analog or digital). The Relay is used to reinforce the signal on the cable and send the signal farther to extend the network length. When the electronic signal is transmitted over the cable, the signal strength decreases as the length of the transfer increases. So the Relay is required to reinforce the signal to increase the transmission distance of the data. 2. A module or device for frequency conversion and power enhancement, such as a relay satellite, which is divided into upstream and downstream frequencies, mainly for signal enhancement and frequency difference.

The Relay allows the network signal to be pushed so that they are transmitted farther. Due to the influence of transmission line noise, the digital signal or analog signal carrying information can only transmit a limited distance. The function of the Relay is to regenerate and transmit the received signal, thus increasing the distance of signal transmission.

It connects two or more segments of the same network. For example, Ethernet often uses the Relay to expand the cable length of the bus. The length of the standard cable Ethernet is up to 185 meters and can have up to 5 segments. Therefore, the maximum network cable length can be increased to 925 meters The In general, the network part of the Relay is the network segment, not the subnet.

The Relay can connect two LAN cables, re-timed and regenerate the digital signals on the cable, and then send them out, which is the first layer in the OSI model - a typical function of the physical layer. The role of the Relay is to increase the coverage area of the LAN.

For example, the Ethernet standard specifies that the maximum length of a single-segment signal transmission cable is 500 meters. However, after connecting the 4-segment cable with a Relay, the signal transmission cable in Ethernet can be up to 2000 meters. Some brands of Relays can be connected to different physical media cable segments, such as fine coaxial cable and cable.

The Relay only sends data from any cable segment to another cable regardless of whether there is any data in the data or data that is not suitable for the segment.

Involving the transmission and reception of the very high frequency radio spectrum lines. This limitation is overcome by the "Relay", which picks up the weak signal and amplifies them later at different frequencies. Thus, using a Relay, a low-power user (such as a mobile station) with a user who can communicate directly to the user's contact will be the other.