Class A Terminal

In a GSM and UMTS system a class A mobile may be attached to both PS (Packet Switched) and CS (Circuit Switched) services. The mobile supports simultaneous attach, simultaneous activation, simultaneous monitor, simultaneous invocation and simultaneous traffic. The mobile user can make and/or receive calls on the two services simultaneously subject to the QoS requirements.


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

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