NRF_Modem lib

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Hi I have Question(s)

related to the nrf9161-DK Board.

I am not using the LTE Firmware, I am using the Nordic DECT-NR+ Library on it.

How can I set the time manually for the nrf_modem lib ?
How can I override and pass the date_time_evt_handler to the nrf_modem which is running?

Behind is the story of syncing some devices over the air...
Or is there some hidden layer which provides it on PHY Layer over the air ?

Because there is no LTE / GPS etc. GNSS anymore and the L2 Clock Syncing - IEEE 1588 PTP V2 is cool, but it is not available over the air, or ?

I understand that the LFCLK is the time source for the nrf_modem.
Can I simply sync those sources ? so far I know it is not that easy, maybe a counter or I need from the local board the frequency etc. phase and must pass those information to the other boards.

Can you help here?

I just checking where are touch points to get the time.
Because I on a sort of syncing over the air topic right now.

kind regards
Christoph

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The Current Nordic dect-nr+ Implementation I have seems like not to include a set_time(...) function, or?

I Have those docs information:

• https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/others/date_time.html#c.date_time_update_async
• https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/libraries/others/date_time.html#c.date_time_set
• firmware of the dect-nr+ from nordic with include header FW-Version: mfw-nr+_nrf91x1_1.0.0-46.prealpha.zip or nrf-dect-0.5.0

In the includes I see there is a time_get function, but no time_set or modem time_sync function.

Is there any?
Will there be any?
I am I totally wrong? and just syncing the clocks "somehow" outside and use this as a source is fine?

Please correct me.

I can post also the includes, but I believe this is nda material, because pre-release.

It would be really cool if I can "play" with the time and do syncing for a research task.

Thanks in advance.

greetings