EntityQ1257448· pop 6· linked from 18 articlesMessage Transfer PartSign in to savestandard communication protocol for interconnection, linking and transport over public switched networks, part of Signaling System 7 (SS7)Connectionsdata-link layerEntitynetwork layerEntityphysical layerEntitySignalling System No. 7EntityOSI modelEntityAmerican National Standards InstituteEntityInternet Engineering Task ForceEntityapplication layerEntitypublic switched telephone networkEntityEuropean Telecommunications Standards InstituteEntityStream Control Transmission ProtocolEntityITU Telecommunication Standardization SectorEntityE-carrierEntitySIGTRANEntityT-carrierEntityTransaction Capabilities Application PartEntityINAPEntitySignalling Connection Control PartEntityMobile Application PartEntityISDN User PartEntityCategoriesSignaling System 7