A gateway sits between a telephone system,such as a PBX or a central office switch,and a data network,such as the Internet,and translates calls from one format to another.是什么意思_A gateway sits between a telephone system,such as a PBX or a central office switch,and a data network,such as the Internet,and translates calls from one format to another.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句