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908	908	When downloading the images, choose the required image file for download. ​
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	911	+How to set up LSE01 to work in 8 channel mode By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
911	911
912		-How to set up LSE01 to work in 8 channel mode
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914		-By default, the frequency bands US915, AU915, CN470 work in 72 frequencies. Many gateways are 8 channel gateways, and in this case, the OTAA join time and uplink schedule is long and unpredictable while the end node is hopping in 72 frequencies.
915		-
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917	917	You can configure the end node to work in 8 channel mode by using the AT+CHE command. The 500kHz channels are always included for OTAA.
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921	921	For example, in **US915** band, the frequency table is as below. By default, the end node will use all channels (0~~71) for OTAA Join process. After the OTAA Join, the end node will use these all channels (0~~71) to send uplink packets.
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923	923	[[image:image-20220606154726-3.png]]
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934	934	* 905.3 - SF7BW125 to SF10BW125
935	935	* 904.6 - SF8BW500
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	933	+
937	937	Because the end node is now hopping in 72 frequency, it makes it difficult for the devices to Join the TTN network and uplink data. To solve this issue, you can access the device via the AT commands and run:
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	936	+(% class="box infomessage" %)
	937	+(((
939	939	**AT+CHE=2**
	939	+)))
940	940
	941	+(% class="box infomessage" %)
	942	+(((
941	941	**ATZ**
	944	+)))
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943	943	to set the end node to work in 8 channel mode. The device will work in Channel 8-15 & 64-71 for OTAA, and channel 8-15 for Uplink.
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951	951
952	952	= 5. Trouble Shooting =
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954		-
955	955	== 5.1 ​Why I can’t join TTN in US915 / AU915 bands? ==
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957	957	It is due to channel mapping. Please see the [[Eight Channel Mode>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]] section above for details.