Tertiary Device Attributes (DA3) is a control sequence that reports the terminal's tertiary device attributes.
CSI = cCSI = 0 cDCS ! | Text ST Copy
CSI = cCSI = 0 cDCS ! | Text ST
Where Text is the unit ID for the terminal.
If no unit ID is given, or if the unit ID is 0, this function returns the request sequence. Otherwise, it returns the response sequence.
https://vt100.net/docs/vt510-rm/DA3.html
Tertiary Device Attributes (DA3) is a control sequence that reports the terminal's tertiary device attributes.
Where Text is the unit ID for the terminal.
If no unit ID is given, or if the unit ID is 0, this function returns the request sequence. Otherwise, it returns the response sequence.