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Interim Standard 95
Internet Security Association and Key Management Protocol
IP multimedia subsystem Service Control interface
Integrated Services Digital Network
Industry Specification Group
Inter Symbol Interference
IMS Subscriber Identity Module
Industrial, Scientific and Medical
Inter System Mobility Policy
International Standards Organization
Internet Society
Internet Service Provider
Inter System Routing Policy
ISDN User Part
Information Technology
Intelligent Transportation System
International Telecommunications Union
International Telecommunications Union-Radio communication Standardization Sector
International Telecommunications Union-Telecommunication Standardization Sector
ITU-T Series A
ITU-T Series B
ITU-T Series C
ITU-T Series D
ITU-T Series E