TrGW - Transition Gateway

The TrGW sits on the media path of any traffic entering or leaving the service provider’s IMS network. The primary role of the TrGW is to facilitate interworking between two different domains which may be using different addressing schemes, codecs etc. The TrGW is controlled by the IBCF (Interconnection Border Control Function).


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

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