Terminology

Abbreviation
Explanation
HLRHome Location Register
HTTPHypertext Transfer Protocol
IMSIInternational Mobile Subscriber Identity
MSISDNMobile Subscriber Integrated Services Digital Network Number
SRI for SMSend Routing Info For Short Message
SS7Signalling System Number 7
SNPACSwedish Number Portability Administrative Center
RFCRequest for Comments, a publication from the Internet Engineering Task Force
MCCMobile Country Code
MNCMobile Network Code
MVNOMobile Virtual Network Operator (do not have their own radio access network)