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optional: MM IDENTITY REQ + RESP (IMSI) if MSC doesn't know TMSI
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MAP SEND AUTH INFO req
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Generate Auth Tuples
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MAP SEND AUTH INFO resp
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MAP INSERT SUBSCR DATA resp
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CIPH MOD CMD
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CIPH MOD COMPL
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MM LOC UPD RESP
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MM TMSI REALLOC COMPL
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CLEAR CMD
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CLEAR COMPL
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