Serial to Fiber Converter, or Fiber Optic Modem (FOM), is a device used in optical network communications for sending and receiving data. It allows data to be transmitted and converts electrical signals to light. Serial to fiber converters can provides transmission distance up to 2 km over multimode fiber and up to 60 km over single mode fiber. Fiber-Mart's serial to fiber converters are available in several types depending upon the protocol selected, including RS-232 to Fiber Converter, RS-485 to Fiber Converter, RS-422 to Fiber Converter, RS-485/422 to Fiber Converter, and RS-485/422/432 to Fiber Converter. Our serial to fiber converters have a higher bandwidth and greater electromagnetic immunity than wire-based modems.