When running emacs (v29.1) -nw on a ThinkPad X61 under FreeBSD 13.2, pressing Backspace generates C-h. The key is not bound to anything.Running C-h k BACKSPACE does not show DEL but C-h-h. Entering BACKSPACE again shows C-h C-h.
BACKSPACE behaves normally outside of emacs.
What can I do so that emacs interprets BACKSPACE properly?