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LoRaWAN ® L2 1.0.4 Specification © 2020 LoRa Alliance ® Page 40 of 90 The authors reserve the right to change specifications without notice. 5.8 End-Device Transmit Parameters (TXParamSetupReq, 1250 TXParamSetupAns) 1251 1252 A Network Server MAY use the TXParamSetupReq command to notify the end-device of the 1253 maximum allowed dwell time, i.e. the maximum continuous transmit time of a packet over the 1254 air, as well as the maximum allowed end-device Effective Isotropic Radiated Power (EIRP). 1255 1256 1257 1258 Table 46: TxParamSetup payload format 1259 1260 The structure of EIRP_DwellTime field is described below: 1261 1262 Bits 7:6 5 4 3:0 MaxDwellTime RFU DownlinkDwellTime UplinkDwellTime MaxEIRP Table 47: MaxDwellTime field format 1263 1264 1265 Bits [0..3] of TXParamSetupReq command are used to encode the MaxEIRP value, as per 1266 the following table. The EIRP values in this table are chosen in a way that covers a wide range 1267 of maximum EIRP limits imposed by the different regional regulations. 1268 1269 Coded Value 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MaxEIRP (dBm) 8 10 12 13 14 16 18 20 21 24 26 27 29 30 33 36 Table 48: Maximum EIRP encoding 1270 1271 1272 The maximum EIRP corresponds to an upper bound on the end-device's radio TX power. The 1273 end-device is not required to transmit at that power but SHALL NOT radiate more than the 1274 specified EIRP. 1275 Bits 4 and 5 define the maximum uplink and downlink dwell times, respectively, which are 1276 encoded as per the following table: 1277 1278 Coded Value Dwell Time 0 No limit 1 400 ms Table 49: Maximum dwell time encoding 1279 If this MAC command is implemented (region-specific), the end-device SHALL acknowledge 1280 the TXParamSetupReq command by sending a TXParamSetupAns command. This 1281 TXParamSetupAns command contains no payload. 1282 Size (octets) 1 TXParamSetup payload EIRP_DwellTime