|DS3-7||Stop Bits||1bit||2bit
|-
|DS3-8||Handshake Bit0||colspan=2 rowspan=2|0=Hardware (printer sends RTS(Ready/Busy), <br>1=SérieSoftware (Printer sends XON/XOFF), <br> 2=SérieSoftware (Computer sends ETX/, printer responds ACK), <br>3=Reserved)
|-
|DS3-9||Handshake Bit1