subscribers trunk dialling

同义词释义

1)subscribers trunk dialling,用户长途电话拨号2)FACD (Foreign Area Customer Dialing),长途电话用户拨号3)Subscriber Trunk Dialing,长途电话拨号4)direct distance dialing ,DDD,长途直接拨号电话5)direct distance dialing (DDD),直接长途拨号电话6)DDD (direct distance dialing),长途电话直接拨号