using the mobaterm connect to OpenWrt uart, i just want to know why it output xterm-256color?
Is this specific to 'mobaterm'?
If "no": Edit OP to remove unnecessary mention/distraction.
If "yes": Asking the Mobaterm devs might be more helpful.
'xterm-256color' is a 'terminal-type-definition' name. 'termcap' maybe a useful term to google for more information about the underlying situation.
NOT termcap, BUT terminfo