... changed, the signal will still be transmitted through the RS-232 to fiber converter without any problem.Features1.Auto sense serial signal ... signal-mode 20KM, 40KM, 60KMCommunication Standard Accord EIA RS-232standard RS-232 signalIN, OUT, GND Fiber signalIN, OUT Working formatAsynchronism, point to point or ... Color WhiteWeight230gUpdate Date:2012-04-24 04:28:12 RS-232 serial optic fiber modem