# TTN "Node" will not join gateway

**URL:** <https://www.thethingsnetwork.org/forum/t/ttn-node-will-not-join-gateway/34657>\
**Category:** End Devices (Nodes)\
**Created:** [February 21, 2020, 4:05pm UTC](https://www.thethingsnetwork.org/forum/t/ttn-node-will-not-join-gateway/34657 "2020-02-21T16:05:52Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\
**Post date:** [February 26, 2020, 10:13am UTC](https://www.thethingsnetwork.org/forum/t/ttn-node-will-not-join-gateway/34657/12 "2020-02-26T10:13:24Z")

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> [@blue2monster](#):
>
> Your #1 gateway transmitted on that day too many packets. Due to fair use policy it will stop.

To extend on [@kersing’s response](https://www.thethingsnetwork.org/forum/t/ttn-node-will-not-join-gateway/34657/10) a bit: indeed, gateways must adhere to a country’s legal maximum duty cycle. (And such maximum duty cycle is not some daily maximum, but applies at all times, 24/7, and is only related to the last transmission time.) But gateways are not affected by [the 24 hours TTN’s Fair Access Policy](https://www.thethingsnetwork.org/forum/t/limitations-data-rate-packet-size-30-seconds-uplink-and-10-messages-downlink-per-day-fair-access-policy-guidelines/1300). The latter only applies to devices, not to gateways.

True, as (current) gateways are half-duplex and cannot receive while transmitting, a network _could_ also limit the number of downlinks that a gateway can transmit even though duty cycle regulations would still allow for it. But as far as I know, TTN has not implemented that. Also, a better solution would be to deploy more gateways, and to enforce the Fair Access Policy for devices (which is currently not enforced).

> [@Philipp\_H](#):
>
> Always with a mix of Errors of No\_Free\_CH or Keys does not match.

You’ll never get an error boldly saying “Keys does not match”. Instead, an RN2xx3 might _suggest_ to make sure the keys (and coverage) are okay, but it will never know what’s the actual problem. To understand `no_free_ch` see [Duty Cycle in the documentation](https://www.thethingsnetwork.org/docs/lorawan/duty-cycle.html).

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