[縮]subscriber trunk dialing;用戶中繼撥號,用戶長途撥號;Internet標準文件
STD 1. {state transition diagram}. 2. {Internet} standard. A subseries of {Request For Comments} (RFC) that specify {Internet} {standard}s. The official list of Internet standards is {STD 1}. See also {For Your Information}. {rfc.net (http://www.rfc.net/)}. (1994-11-30)