ASCII Name for Device Control 1 (often XON)
001 0001, 21, 17, 11, DC1, ␑, Device Control 1 (often XON)
Octal
ASCII Name for Device Control 2
001 0010, 22, 18, 12, DC2, ␒, Device Control 2
ASCII Name for Device Control 3 (often XOFF)
001 0011, 23, 19, 13, DC3, ␓, Device Control 3 (often XOFF)