# Downlink Queue Clarification Wanted (first, last, replace) (Regarding Ports)

**URL:** <https://www.thethingsnetwork.org/forum/t/downlink-queue-clarification-wanted-first-last-replace-regarding-ports/38097>\
**Category:** v2 Backend\
**Created:** [June 26, 2020, 9:36am UTC](https://www.thethingsnetwork.org/forum/t/downlink-queue-clarification-wanted-first-last-replace-regarding-ports/38097 "2020-06-26T09:36:54Z")\
**Posts on this page:** 1\
**Showing post:** 3

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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:** [June 26, 2020, 12:55pm UTC](https://www.thethingsnetwork.org/forum/t/downlink-queue-clarification-wanted-first-last-replace-regarding-ports/38097/3 "2020-06-26T12:55:29Z")

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Heads up: V3 [only supports push and replace](https://thethingsstack.io/v3.8.4/integrations/mqtt/), along with priorities.

(See also the comments in [issue #1948](#https://github.com/TheThingsNetwork/lorawan-stack/issues/1948). And aside: you’re [limited to 10 downlinks per day](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); you may want to rethink your use case if managing the downlinks proves to be hard.)

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