# Does GPS Sync rely on some central server?

**URL:** https://community.cambiumnetworks.com/t/does-gps-sync-rely-on-some-central-server/64800
**Category:** PMP
**Created:** [December 31, 2019, 9:55pm UTC](https://community.cambiumnetworks.com/t/does-gps-sync-rely-on-some-central-server/64800 "2019-12-31T21:55:02Z")
**Posts on this page:** 1
**Showing post:** 60

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### Author: ![CambiumAaron](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/cambiumaaron/32/20177_2.png) [@CambiumAaron](https://community.cambiumnetworks.com/u/CambiumAaron)
#### Post date: [December 12, 2023, 4:45pm UTC](https://community.cambiumnetworks.com/t/does-gps-sync-rely-on-some-central-server/64800/60 "2023-12-12T16:45:26Z")

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FYI there are other posts on this with more detail here:

> [@Leap Year impact on GPS sync - uGPS, cnPulse and ePMP1000/2000/3000 Access Points](https://community.cambiumnetworks.com/t/leap-year-impact-on-gps-sync-ugps-cnpulse-and-epmp1000-2000-3000-access-points/96343):
>
> I am re-publishing a Field Service Bulletin from 2020 to highlight the potential for GPS synchronization loss when using Cambium uGPS, cnPulse or ePMP 1000/2000/3000 APs using integrated GPS. While many of you may have upgraded your sync hardware since 2020, if you are using any of these devices that are running firmware version AXN5.1.1 or lower, you may lose synchronization on leap year 2024 (January 1, 2024). Please reference the Field Service Bulletin below for details.

and here:

> [@Leap Year impact on GPS sync using uGPS, cnPulse and ePMP1000/2000/3000 Access Points](https://community.cambiumnetworks.com/t/leap-year-impact-on-gps-sync-using-ugps-cnpulse-and-epmp1000-2000-3000-access-points/96342/4):
>
> Thank you for following up Chuck. So did the investigation listed in other threads yield zero results? I anticipated some sort of update over the 3+ year period. Will there be further investigation into a firmware fix, or are we just going to need to prepare if we still run 450’s by the following leap year in 2028? (Long time from now, just curious) 2nd question. Will Cambium be issuing a new FSB for this known issue, and potentially sending out a notice on the mailing lists? Realistically this…

Also, there is a way to schedule the reboots for devices via cnMaestro that maybe you would consider scheduling for shortly after midnight Moscow Standard Time on 1/1/2024.

To schedule reboot of multiple APs via cnMaestro:

Go to “Inventory” screen, click “Apply Filters” button, select “PMP AP” in “Type” to select all PMP APs. Then click “Actions \> Schedule Reboot” and schedule the reboot for 5 minutes after new year in Moscow.

 ![image](https://d1okf4ta8xniw3.cloudfront.net/original/3X/4/6/46cfbc8f15805e1f2602b4d3e5b45242575a1b7b.png)

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