Fiber optic attenuators are devices used to reduce or monitor the power level of a fiber optic signal. Basic types of fixed attenuation include single mode, dual window and multimode in D4/PC, FC, FC/UPC, MU, SC, SC/APC and UPC, ST and ST/UPC style connectors. We offer SM and PM electronic VOAs that provide control of the output power with FC/PC or FC/APC connectors. Our SM and PM manual VOAs are available. FS fixed and variable fiber optic attenuators with leading attenuating fibers guarantee consistent and stable fiber attenuation (0~60dB) in WDM transmission. Understanding it is crucial for anyone involved in data centers, telecommunications, or enterprise networking.