Fibertronics, Inc. fiber optic loopbacks are engineered to redirect media flow, commonly employed for testing and network troubleshooting purposes. They serve as valuable tools in pinpointing faults within testing equipment. Featuring a compact design, our loopbacks can be tailored to meet specific requirements such as varying lengths, jacket types, and more. Compliant with ATM, fast Ethernet, fiber channel, and gigabit Ethernet standards, they are offered in both multimode and single-mode configurations.