SS7(C7) Protocol Analysis
SS7 (Signaling System 7) separates the information required to set up and manage telephone calls in the Public Switched Telephone Network (PSTN) onto a separate packet switched network (Signaling Network). It uses Message Signal Units (MSUs), Link Status Signal Units (LSSUs), and Fill-In Signal Units (FISUs) as signal units. The main protocols include MTP (Message Transfer Part - Level 1 to 3), SCCP (Signalling Connection Control Part), and ISUP (ISDN User Part).
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