![]() ![]() Fiber optic loopback cables follow various international standards such as IEC, TIA/EIA, NTT and JIS specifications. This type of loopback cable can be classified according to its connector type, such as LC, SC, FC, MTRJ to meet the connection needs of different devices. Hey usually consist of two fiber optic connectors one is plugged into the output port of the device and the other into the input port. Here are some common loopback cable types:įiber optic loopback cables are used to test fiber optic equipment and connections. Loopback cables come in many types for network testing and troubleshooting, each suitable for different types of ports and testing needs. This looping transmission allows network engineers to test the ports performance and functionality without actually connecting to other devices or networks. This means that both the sender and receiver are on the same port, and the data never actually leaves the device, but is circulated within the device. When a loopback cable is plugged into a port on a network device, it directs data sent from that port back to the same port. The working principle of loopback cable is very simple, but very effective. This self-test helps identify network problems and validates network equipment’s transmission capabilities, receiving sensitivity, and other performance metrics. Its main function is to simulate the data transmission process, during which the data sent from one port is immediately returned to the same port, thus realizing self-testing. ![]() Loopback cable, also known as a loopback plug or loopback adapter, is a connection device used to test the physical ports of network devices. Application scenarios of loopback cable.
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