The IEC-104 and IEC-101 protocols share the same ASDU level messaging but differ on the link level. IEC-104 is intended for packet-switched TCP/ IP communication whereas IEC-101 is intended for serial communication. By using the device, the IEC-101 slaves (for example RTUs) can be connected to a IEC-104 master (for example SCADA). The device requests an event from the IEC-101 slave locally and sends them to the IEC-104 master. This eliminates the need to continuously poll the data remotely and therefore reduces the communication costs on pay-per-use wireless network.