There are both single-mode and multimode attenuators with attenuation levels typically ranging from 1dB to 30dB, which can either be a fixed or a variable / adjustable level style. These attenuators are suitable for use in single mode 9/125, multimode 50/125, and multimode 62. Multimode cables limit the distance that the signal can travel as multiple paths of transmission cause modes of. M2 Optics offers a wide range of high-performance fixed fiber optic attenuators for Telecom, CATV, Data Center, and Aerospace applications. While many offer a male-to-female connection configuration with LC, SC, FC, ST, or MPO connectors, there are now. Thorlabs' Multimode Fixed Fiber Optic Attenuators allow one to attenuate an optical signal easily by plugging multimode fibers or components directly into the attenuator.