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...	...	@@ -422,20 +422,28 @@
422	422	downlink
423	423
424	424	(((
	425	+(((
425	425	If you want to get a successful reply to send downlink in TTN v3. You need to set the response level.
426	426	)))
	428	+)))
427	427
428	428	(((
	431	+(((
429	429	If the equipment uses CLASS A. You can set AT+RPL=2 or send the downlink command: 2102
430	430	)))
	434	+)))
431	431
432	432	(((
	437	+(((
433	433	If the equipment uses CLASS C. You can set AT+RPL=4 or send the downlink command: 2104
434	434	)))
	440	+)))
435	435
436	436	(((
	443	+(((
437	437	When the device successfully receives the downlink, the server will receive a confirmation packet of 00.
438	438	)))
	446	+)))
439	439
440	440	[[image:https://wiki.dragino.com/images/thumb/d/d9/Downlink_54.png/600px-Downlink_54.png||height="127" width="600"]]
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...	...	@@ -445,7 +445,7 @@
445	445
446	446	(((
447	447	These pages are useful to check what is wrong on the Join process. Below shows the four steps that we can check the Join Process.
448		-\\If problem not solve, and you need dragino remote support, please follow to this document: [[TTN Support instruction>>url:https://www.dragino.com/downloads/index.php?dir=&file=TTNv3_Support_Guide.pdf]] If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the screenshots for each step to check. They include:
	456	+\\If problem not solve, and you need dragino remote support, please follow to this document: [[TTN Support instruction>>url:https://www.dragino.com/downloads/index.php?dir=&file=TTNv3_Support_Guide.pdf]](% style="color:red" %) **If user has checked below steps and still can't solve the problem, please send us (support @ dragino.com) the screenshots for each step to check. They include:**
449	449	)))
450	450
451	451	* End node is connected to serial port to show the Join frequency and DR. (If possible)
...	...	@@ -473,8 +473,12 @@
473	473
474	474	**2. Gateway packet traffic in gateway web or ssh. we can check:**
475	475
476		-* If the gateway receive the Join request packet from sensor? (If this fail, check if the gateway and sensor works on the match frequency)
477		-* If the gateway gets the Join Accept message from server and transmit it via LoRa?
	484	+* (((
	485	+If the gateway receive the Join request packet from sensor? (If this fail, check if the gateway and sensor works on the match frequency)
	486	+)))
	487	+* (((
	488	+If the gateway gets the Join Accept message from server and transmit it via LoRa?
	489	+)))
478	478
479	479	[[image:https://wiki.dragino.com/images/thumb/1/1c/OTAA_Join-2.png/600px-OTAA_Join-2.png||height="325" width="600"]]
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...	...	@@ -483,9 +483,15 @@
483	483
484	484	**3. Gateway Traffic Page in LoRaWAN Server**
485	485
486		-* If the Join Request packet arrive the gateway traffic in server? If not, check the internet connection and gateway LoRaWAN server settings.
487		-* If the server send back a Join Accept for the Join Request? if not, check if the keys from the device match the keys you put in the server, or try to choose a different server route for this end device.
488		-* If the Join Accept message are in correct frequency? If you set the server to use US915 band, and your end node and gateway is EU868, you will see the Join Accept message are in US915 band so no possible to Join success.
	498	+* (((
	499	+If the Join Request packet arrive the gateway traffic in server? If not, check the internet connection and gateway LoRaWAN server settings.
	500	+)))
	501	+* (((
	502	+If the server send back a Join Accept for the Join Request? if not, check if the keys from the device match the keys you put in the server, or try to choose a different server route for this end device.
	503	+)))
	504	+* (((
	505	+If the Join Accept message are in correct frequency? If you set the server to use US915 band, and your end node and gateway is EU868, you will see the Join Accept message are in US915 band so no possible to Join success.
	506	+)))
489	489
490	490	[[image:https://wiki.dragino.com/images/thumb/d/da/LoRaWAN_Communication_Debug22.png/600px-LoRaWAN_Communication_Debug22.png||height="268" width="600"]]
491	491