# Why does this problem appear too early? **URL:** \ **Category:** TTN Network and Services\ **Created:** [July 5, 2022, 2:41am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866 "2022-07-05T02:41:41Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/orange_zouxiangcheng/32/35697_2.png) [@orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/u/orange_zouxiangcheng)\ **Post date:** [July 5, 2022, 2:41am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/1 "2022-07-05T02:41:42Z")
Hello, please ask a question, in Class C mode, TTN(NS) sends data too early(NS displays an error message: Failed to transmit downlink Downlink transmission failed with result Too EARLY), resulting in packet loss problems. Why? Thank you! ![5png](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/b/d/bde6f8ee73ee308cf8c76f1b5d621febbb5b4de3.png) ---
**Author:** ![orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/orange_zouxiangcheng/32/35697_2.png) [@orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/u/orange_zouxiangcheng)\ **Post date:** [July 5, 2022, 2:45am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/2 "2022-07-05T02:45:08Z")
Everyone, please analyze the cause of the problem and give a solution. Very grateful. ---
**Author:** ![jreiss](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jreiss/32/46529_2.png) [@jreiss](https://www.thethingsnetwork.org/forum/u/jreiss)\ **Post date:** [July 5, 2022, 4:00am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/3 "2022-07-05T04:00:46Z")
See gateway settings \> lorawan options \> schedule any time delay ![Screenshot_20220704-225455_Chrome](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/0/d/0db75c4bdf3f36c1f5ca47c45fdac5066c810e7b.jpeg) Detailed discussions here > **[RAK2245 - Downlink rejected](https://forum.rakwireless.com/t/rak2245-downlink-rejected/3704/2)** > > It would appear that either your Internet backhaul or the TTN infrastructure is not operating quickly enough to meet LoRaWAN timing requirements. This message is a little bit confusing, because by “too much in advance” it really means “too... And here > [@TTN & GPRS: dealing with the latency](https://www.thethingsnetwork.org/forum/t/ttn-gprs-dealing-with-the-latency/32763): > > Hello everyone. Ok, I got a mission here. I found several threads touching this problem but none really hit to the point, and epilogues are too vague to be of real help to the most, so I’m willing to clear up things and reach a stable point. I’ll try to be as more clear and succinct as possible, and I hope in a constructive “debate”. EQUIPMENT I have a Kerlink Wirnet Station expected to work by GPRS using SPF. It is configured and surfs as expected. Ping round-trip is about 400ms. I tried th… ---
**Author:** ![orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/orange_zouxiangcheng/32/35697_2.png) [@orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/u/orange_zouxiangcheng)\ **Post date:** [July 5, 2022, 5:47am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/4 "2022-07-05T05:47:22Z")
Can you tell me more about that? What is said here is a bit difficult to understand, and I hope what can be said makes me understand better. I also have a choice of the content of the pictures you show. ---
**Author:** ![jreiss](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jreiss/32/46529_2.png) [@jreiss](https://www.thethingsnetwork.org/forum/u/jreiss)\ **Post date:** [July 5, 2022, 2:41pm UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/5 "2022-07-05T14:41:15Z")
Can you find the Gateway settings \> Lorawan Options \> Schedule any time delay setting in the TTN UI? Try different values, you can choose bigger or smaller delays to adjust the Internet packet time from network to gateway. Would try a larger value. ---
**Author:** ![orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/orange_zouxiangcheng/32/35697_2.png) [@orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/u/orange_zouxiangcheng)\ **Post date:** [July 6, 2022, 2:19am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/6 "2022-07-06T02:19:28Z")
Thank you！I ask one more question, when I use ClassC mode, after successfully joining the gateway, the data sent from TTTN cannot be received (the gateway normally receives data from TTN), and the device needs to send a piece of data before it can receive The Class C mode can be received normally. Why? ---
**Author:** ![jreiss](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jreiss/32/46529_2.png) [@jreiss](https://www.thethingsnetwork.org/forum/u/jreiss)\ **Post date:** [July 6, 2022, 8:23pm UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/7 "2022-07-06T20:23:40Z")
After join an uplink packet is usually needed to confirm that the join accept has been recieved and the session keys are correct. ---
**Author:** ![orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/orange_zouxiangcheng/32/35697_2.png) [@orange\_zouxiangcheng](https://www.thethingsnetwork.org/forum/u/orange_zouxiangcheng)\ **Post date:** [July 9, 2022, 3:13am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/8 "2022-07-09T03:13:13Z")
How should I know first that my device exited the gateway. For example, the gateway is out of power, or the gateway is malfunctioning. What I know now is that I can send an AT command LinkCheck message to determine the status of the network connection, but I want to know it first. ---
**Author:** ![Jeff-UK](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeff-uk/32/35697_2.png) [@Jeff-UK](https://www.thethingsnetwork.org/forum/u/Jeff-UK)\ **Post date:** [July 9, 2022, 8:19am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/9 "2022-07-09T08:19:12Z")
Please do not hijack threads or double post……it splits volunteers efforts. See earlier response to your near identical post. > [@Device network connection status](https://www.thethingsnetwork.org/forum/t/device-network-connection-status/57919): > > When I use the SX1262, how should I know first that my device exited the gateway. For example, the gateway is out of power, or the gateway is malfunctioning. What I know now is that I can send an AT command LinkCheck message to determine the status of the network connection, but I want to know it first, just like WiFi. Is there a way? I know you started this thread, but topic is very different from last post needs. ---
**Author:** ![gmbo](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/gmbo/32/44651_2.png) [@gmbo](https://www.thethingsnetwork.org/forum/u/gmbo)\ **Post date:** [May 18, 2023, 11:45am UTC](https://www.thethingsnetwork.org/forum/t/why-does-this-problem-appear-too-early/57866/10 "2023-05-18T11:45:48Z")
> [@orange\_zouxiangcheng](#): > > Failed to transmit downlink Downlink transmission failed with result Too EARLY I had exactly the same message. (Failed to transmit downlink Downlink transmission failed with result Too EARLY) I got even 4 messages always in the same seconds after a telegram. Since I assumed that there is no error in the application I looked at the default Lora settings in the OS of my MikroTik LR8 gateway and found something there that contributes to the error. In the server settings 8 servers from TTN and TTI were entered. After I removed all but “eu1.cloud.thethings.network” the error messages disappeared. Maybe this will help those who are looking for the error here. Translated with [www.DeepL.com/Translator](http://www.DeepL.com/Translator) (free version) My English is too bad.