Issue link: https://read.uberflip.com/i/1540208
Regional Parameters RP002-1.0.5 ©2022-2025 LoRa Alliance ® Page 80 of 116 The authors reserve the right to change specifications without notice. Data Rate DwellTime=0 (No Limit) DwellTime=1 (400 ms Limit) M N M N 0 59 51 N/A N/A 1 59 51 N/A N/A 2 123 115 19 11 3 123 115 61 53 4 250 242 133 125 5 250 242 250 242 6 250 242 250 242 7 250 242 250 242 8:11 Not defined Not defined 12 250 242 250 242 13 250 242 250 242 14:15 Not defined Not defined Table 73: AS923 maximum payload size (not repeater compatible) 1616 The end-device SHALL only enforce the maximum downlink MACPayload size defined for 1617 DownlinkDwellTime = 0 (no dwell time enforced) regardless of the actual setting. This 1618 prevents the end-device from discarding valid downlink messages that comply with the 1619 regulatory requirements that may be unknown to the device (for example, when the device is 1620 joining the network). 1621 3.10.7 AS923 Receive Windows 1622 By default, the RX1 receive window uses the same channel as the preceding uplink. The data 1623 rate is a function of the uplink data rate and the RX1DROffset, as given by the following 1624 table. The allowed values for RX1DROffset are in the [0:7] range. 1625 Values in the [6:7] range allow setting the downstream RX1 data rate higher than the upstream 1626 data rate. End-devices that do not support DR6 and DR7 SHALL NOT transmit uplinks using 1627 DR5 when Rx1DROffset is set to 6 and SHALL NOT transmit uplinks using DR4 or DR5 1628 when Rx1DROffset is set to 7. The highlighted cells in Table 74 and Table 75 indicate the 1629 uplink / downlink data rate combinations, where operation is not possible for end-devices that 1630 only support data rates from DR0 to DR5. End-devices SHALL reject LinkADRReq 1631 commands, with a negative acknowledgment of DataRateACK, that set its uplink data rate 1632 such that its RX1 downlink data rate is not supported. End-devices SHALL reject 1633 RXParamSetupReq, with a negative acknowledgment of RX1DROffsetACK, that set its 1634 RX1DROffset value such that its RX1 downlink data rate is not supported. End-devices that 1635 receive a value of RX1DROffset of 6 or 7 as part of the Join-Accept frame SHALL select an 1636 initial uplink data rate that ensures its RX1 downlink data rate is supported. 1637 1638