name: ITU
full_form: International Telecommunications Union
context: Communication for IMS (PUCI)". [4] 3GPP TS 29.163: "Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks". [5] 3GPP TS 23.228: "IP Multimedia Subsystem (IMS); Stage 2". [6] 3GPP TS 33.210: "3G security; Network Domain Security (NDS); IP network layer security". [7] 3GPP TS 23.081: "Line Identification supplementary services; Stage 2". [8] Caller ID spoofing, http://en.wikipedia.org/wiki/Caller_ID_spoofing [9] 3GPP TS 22.081: "Line Identification supplementary services - Stage 1" [10] 3GPP TS 29.011: âSignalling interworking for supplementary servicesâ [11] ITU Q.701: âFunctional description of the message transfer part (MTP) of SignallingSystem No. 7â [12] ITU Q.704: âSignalling network functions and messagesâ [13] ITU Q.723: âTelephone user part formats and codesâ [14] ITU Q.931: âISDN user-network interface layer 3 specification for basic call control ITU-Tâ [15] ITU Q.951: âDigital subscriber signalling system No.1 Stage 3
description: The International Telecommunications Union (ITU) is a specialized agency of the United Nations responsible for issues that concern information and communication technologies. In the context of telecommunications, ITU plays a crucial role in developing standards and recommendations for the industry.
explanation: ITU is classified as an Organization based on its role as a standardization body referenced throughout the provided context from various 3GPP technical specifications.
section_title: 2	References
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