I3DSS:Intelligent,Interactive and Integrated Decision Support Systems,智能、交互、集成决策支持系统
IRP:Integration Reference Point,集成参照点
ISP:International Signalling Point,国际信令点
ISPC:International Signalling Point Code,国际信令点编码。关联词:NSPC
ISTP:International Signalling Transfer Point,国际信令转接点
ISUP:ISDN User Part,ISDN用户部分。关联词:DUP、TUP