1. A user equipment (UE) arranged to wirelessly communicate with a network, the UE being configured to:transmit a Radio Resource Control (RRC) Connection Request message as part of a wireless connection establishment procedure for forming a wireless connection between the UE and the network,
wherein said RRC Connection Request message includes an RRC establishment cause,
wherein the RRC establishment cause is configurable to include any of a plurality of different cause indicators including:
a mobile terminating access (mt-Access) indicator,
a mobile originating data (mo-data) indicator, and
at least one further indicator of mobile originating data that is used for the UE when operating in a small data transmission mode.