Architecture OverviewGSM elements and subsystemsInterfaces and numberingSignaling across the various interfacesGSM identities
Common Channel Signaling and StandardsSwitches, STPs and databasesLinks – low-speed & high-speedNetwork interconnectionSS7 protocol and GSM3GPP standards
A-InterfaceSignaling on the A-interfaceConnection-oriented SCCPBSSMAP and DTAPCall flows across the A-interface GSM MAPITU-T TCAP structureGSM MAP operationsGSM MAP parametersGSM MAP standards documentsISDN-UP in handovers
GSM Call Flow ScenariosLocation UpdatingAuthentication and CipheringMobile Originated CallsMobile Terminated CallsShort Message ServiceHandovers
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