(This course introduces the CCS7 signaling system, mainly on the functional level structure of the CCS7 signaling system. The main points explain the three functional levels of MTP, the network service service provided by SCCP, the addressing and routing function, the service interface and the message structure of SCCP, the message format of TUP and ISUP, and the characteristics of TUP and ISUP in MSC. A brief introduction to the TCAP and MAP sections.)
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