[计] call not accepted signal, call-not-accepted signal
hū jiào bù jiē shòu xìn hào ㄏㄨ ㄐㄧㄠˋ ㄅㄨˋ ㄐㄧㄝ ㄕㄡˋ ㄒㄧㄣˋ ㄏㄠˋ