业务: vocational work; professiona ...数据: data; record; information业务数据点: service data point sdp业务数据库: service database业务数据网: isdn-integated service data network业务数据单元: sdu service data unit; service data unit sdu业务数据功能: service data function sdf业务数据管理: service data management sdm业务数据模板: service data template业务数据目录: bdc业务数据清除: transaction clear业务数据功能,服务数据功能: service data function (sdf)传送业务数据单元: tsdu transport service data unit等时业务数据单元: isochronous service data unit分组业务数据信道: packet data traffic channel pdtch核心业务数据单元: csdu core service data unit会晤业务数据单元: ssdu session service data unit子网业务数据单元: snsdu subnetwork service data unit综合业务数据网: integrated services degital network; integrated services digital network (isdn); isdn integrated service digital network数据链路业务数据单元: dlsdu data link service data unit非结构化补充业务数据: ussd unstructured supplementary service data加速会晤业务数据单元: xssdu expedited session service data unit宽带综合业务数据网: b-isdn broadband-isdn; b-isdnbroadband-isdn; broadband isdn窄带综合业务数据网: n-isdn narrow band-isdn; no naow band-isdn; no narrow band-isdn普通数据会晤业务数据单元: nssdu normal data session service data unit