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LoRaWAN Regional Parameters ©2016 LoRa™ Alliance Page 23 of 45 The authors reserve the right to change specifications without notice. ChMaskCntl ChMask applies to 4 RFU 5 RFU 6 All channels ON The device should enable all currently defined channels independently of the ChMask field value. 7 RFU Table 24: ChMaskCntl value table 1 If the ChMask field value is one of the values meaning RFU, then end-device should reject 2 the command and unset the "Channel mask ACK" bit in its response. 3 2.4.6 EU433 Maximum payload size 4 The maximum MACPayload size length (M) is given by the following table. It is derived from 5 limitation of the PHY layer depending on the effective modulation rate used taking into 6 account a possible repeater encapsulation layer. The maximum application payload length in 7 the absence of the optional FOpt control field (N) is also given for information only. The 8 value of N might be smaller if the FOpt field is not empty: 9 10 DataRate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 230 222 5 230 222 6 230 222 7 230 222 8:15 Not defined Table 25: EU433 maximum payload size 11 If the end-device will never operate with a repeater then the maximum application payload 12 length in the absence of the optional FOpt control field should be: 13 14 DataRate M N 0 59 51 1 59 51 2 59 51 3 123 115 4 250 242 5 250 242 6 250 242 7 250 242 8:15 Not defined Table 26 : EU433 maximum payload size (not repeater compatible) 15 16 2.4.7 EU433 Receive windows 17 The RX1 receive window uses the same channel than the preceding uplink. The data rate is 18 a function of the uplink data rate and the RX1DROffset as given by the following table. The 19

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