拨号: dial; dialing; selection音: sound拨号音不断: non-stodial tone拨号音电键: dial tone key拨号音阶段: dial tone trunk拨号音延时: dial tone delay部分拨号音: partial dial tone长途拨号音: trunk tone二次拨号音: second dialing tone; secondary dial tone泛拨号音: partial dial tone没有拨号音: there is no dial tone视频拨号音: vdt video dial tone; vdt video dial-tone; video dialtone数字拨号音: digital dial tone特殊拨号音: special dial tone特种拨号音: special dial tone一次拨号音: dodi:direct outward dialing one重新拨号音: recall tone; reorder tone专用拨号音: private dial tone拨号音标识器: dial tone marker拨号音标志器: dial tone marker拨号音中继线: dial train精确的拨号音: precise dial tone先送拨号音的: dial tone first注意拨号音调: attention dial tone拨号后拨号音不断: non stop dial tone