Band plan as per: https://www.thethingsnetwork.org/wiki/LoRaWAN/Frequencies/Frequency-Plans#lorawan-frequencies_australia-915-928mhz
AU915 Data rate table
DataRate Configuration Indicative physical bit rate [bit/sec] 0 LoRa: SF10 / 125 kHz 980 1 LoRa: SF9 / 125 kHz 1760 2 LoRa: SF8 / 125 kHz 3125 3 LoRa: SF7 / 125 kHz 5470 4 LoRa: SF8 / 500 kHz 12500 5:7 RFU 8 LoRa: SF12 / 500 kHz 980 9 LoRa: SF11 / 500 kHz 1760 10 LoRa: SF10 / 500 kHz 3900 11 LoRa: SF9 / 500 kHz 7000 12 LoRa: SF8 / 500 kHz 12500 13 LoRa: SF7 / 500 kHz 21900 14:15 RFU