Black Box MD940A-FST Fiber Driver is a ST-to-DB25 Female RS-232 fiber-optic transceiver that lets you transport serial data over a fiber link, with the RS-232 interface on the DB25 female side and an ST fiber connector on the remote end. This model is part of Black Box's MD940A family and is typically used in pairs with a remote Fiber Driver to create a point-to-point RS-232 extension across fiber. Configurations commonly pair the local MD940A-FST with a remote unit such as MD940A-MST to complete the link, with ST-type fiber connectors specified for these models. Some listings indicate the package includes plug adapters (WW3).
