The L-com FOL-AT-LCUMM-10D is an attenuated fiber loopback module used for testing and provisioning fiber optic data links. The L-com FOL-AT-LCUMM-10D features LC connectors and 50/125um multimode fiber with an attenuation level of 10dB, which allows for directly connecting transmitter and receiver ports (looping back) without the need for a separate fiber cable and inline attenuators. The L-com FOL-AT-LCUMM-10D attenuated fiber loopback module is one of thousands of quality fiber optic components and solutions available in-stock and ready to ship from L-com.