... computer's RS232 port. Chose the corresponding number of the COM port. Switch the 10bit, 11bit selection switch to 11 bit. ... 120Ωi end resistance n between the 3, 8 of RS485 plugs to eliminate signal reflection, as ... 11. 10 bits MODEM refers: 1 outset bit, 8 data bits, no parity bit, and 1 stop bit ... market. 11 bits MODEM refers: 1 outset bit, 8 data bits, 1 parity bit (Occasionally bit check), ...