VOIP, GSM and 3G Call Flows

The call flow diagrams were generated using EventStudio System Designer.

SIP and H.323 Call Flow Diagrams

GSM Circuit Switched Call Flows

GSM Handover Call Flows

GSM GPRS Sequence Diagrams

3G UMTS Sequence Diagrams

ISDN User Part (ISUP) Call Flows

V5.2 Protocol Call Flows

SIGTRAN Protocols