Noland Engineering AM43 NMEA 0183 Hi-speed Multiplexer - USBNoland AM43 NMEA 0183 USB Multiplexer The AM43 Multiplexer combines up to four NMEA 0183 inputs into common outputs. It supports AIS inputs with baud rates to 38,400 as well as encapsulation sentences. Multiple outputs are provided: a USB interface and two NMEA 0183 outputs (4800 38,400 baud). A Talker (TLK) port is also included to allow a computer to request specific messages from instruments or to send data such as waypoints, routes, or steering