... transmit Multi-mode 2KM, signal-mode 20KM, 40KM, 60KM The Model277/A Series converter is equipped with a multiple interface circuit ... 232 serial interfaces and multi-mode or single- mode fiber. Model277/A converters are used to extend serial transmission distance up ... same time to convert to fiber.Auto Baud Rate DetectionThe Model277/A Series incorporates a method for automatically detecting the serial ...