1234123456789123456789 NUL Ignored
SOH Ignored
ETX Ignored
EOT Ignored
ENQ Transmit answerback message
BEL Bell
BS Backspace
HT Horizontal tab
LF Linefeed or CR LF
VT same as LF
FF same as LF
CR Carriage Return
SO Shift to G1 character set
SI Shift to G0 character set
DC1 Ignored (Alternate XOn)
DC3 Ignored (Alternate XOff)
CAN Cancel
SUB Cancel
DEL Ignored
US Ignored
RS Ignored
FS Ignored
SYN Ignored
EM Ignored
ETB Ignored
NAK Ignored
DLE Ignored
XON In XOn/XOff flow control mode
XOFF intercepted by ST bios, otherwise ignored