... :RS232 speed: 0-115200bps;RS232 support for RXD, TXD, GND 3-line approach to work;RS422 support for RX-, RX +, TX ... um,62.5/125 um,100/140um;single mode 8.3/125 um,9/125um,10/125umTransmission distance: MM 2Km,SM ... with two optical ports support daisy chain link Ci-sf110-m/s