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BSC
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HLR
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L1 RACH burst
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Allocation of dedicated channel
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RSL CHAN ACT
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RSL CHAN ACT ACK
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Switch form BCCH/CCCH
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to dedicated channel
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LAPDm SABM (MM LOC UPD REQ)
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RSL DATA IND (MM LOC UPD REQ
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BSSAP COMPL L3 (MM LOC UPD REQ
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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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MM AUTH REQ
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MM AUTH RESP
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MAP UPD LOC AREA req
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MAP INSERT SUBSCR DATA req
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MAP UPD LOC AREA resp
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BSSMAP CIPH MODE CMD
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