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S1AP - S1 Application Protocol

S1AP is used between the eNB and the MME in order to support operations such as E-RAB (E-UTRAN Radio Access Bearer) Management, transfer of UE Context information, NAS Signalling transport, Paging and EPC based mobility.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

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