PFI - Packet Flow Identity

The Packet Flow Identifier is used to indicate a PFC (Packet Flow Context) associated with an LLC (Logical Link Control) – PDU (Protocol Data Unit). If the mobile does not support PFC or if the PFI is not known by the SGSN (Serving GPRS Support Node), then it will use the pre-defined PFI indicating best effort QoS (Quality of Service).


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

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