# NOTICE - Need for ePMP Upgrade **URL:** https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457 **Category:** ePMP **Tags:** field-service-bulletin **Created:** [November 30, 2020, 2:44pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457 "2020-11-30T14:44:57Z") **Posts on this page:** 9 **Page:** 1
### Author: ![CambiumChuck](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/cambiumchuck/32/30895_2.png) [@CambiumChuck](https://community.cambiumnetworks.com/u/CambiumChuck) #### Post date: [November 30, 2020, 2:44pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/1 "2020-11-30T14:44:57Z")
On July 1, 2021 Cambium will update the certificate for [https://cloud.cambiumnetworks.com](https://cloud.cambiumnetworks.com) to use a new Certificate Authority. All cnMaestro managed devices without the updated Root CA certificate will fail to connect to the cnMaestro Cloud service. Please see the following Field Service Bulletin (FSB) for ePMP upgrade instructions. > **[fsb9083 - Cambium Networks](https://www.cambiumnetworks.com/support/field-service-bulletins/fsb9083/)** > > FIELD SERVICE BULLETIN Update cnMaestro Cloud Managed Device Software by June 30, 2021 to Prevent Service Loss Document Number FSB9083 Revision 000v001 Download the PDF version Application Global Effective Date Nov 10, 2020 Expiry Date N/A BULLETIN... [FSB9083 - cnMaestro Cloud Managed Devices Require Software Upgrades by June 30, 2021.pdf](https://community.cambiumnetworks.com/uploads/short-url/2I4xhkM2G8XtHLPjmBuA5FMlOJg.pdf) (378.6 KB) ---
### Author: ![ninedd](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/n/57b2e6/32.png) [@ninedd](https://community.cambiumnetworks.com/u/ninedd) #### Post date: [December 3, 2020, 11:26pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/2 "2020-12-03T23:26:41Z")
So does this mean that our ePMP 2.4Ghz gear (which we have running firmware 3.5.6) will not communicate with cnMaestro after that date? ---
### Author: ![Cambium\_Sri](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/c/838e76/32.png) [@Cambium\_Sri](https://community.cambiumnetworks.com/u/Cambium_Sri) #### Post date: [December 7, 2020, 9:29pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/3 "2020-12-07T21:29:46Z")
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### Author: ![WISE\_WiFi](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/w/ecc23a/32.png) [@WISE\_WiFi](https://community.cambiumnetworks.com/u/WISE_WiFi) #### Post date: [December 30, 2020, 2:48am UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/4 "2020-12-30T02:48:21Z")
Any answer? Is anybody running current firmware on 2.4Ghz? And if yes how is it working out. ---
### Author: ![Eric\_Ozrelic](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/eric_ozrelic/32/16188_2.png) [@Eric\_Ozrelic](https://community.cambiumnetworks.com/u/Eric_Ozrelic) #### Post date: [December 30, 2020, 9:20am UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/5 "2020-12-30T09:20:12Z")
Yes, we have many e1k 2.4GHz radios running 4.5.6. All working fine. ---
### Author: ![WISE\_WiFi](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/w/ecc23a/32.png) [@WISE\_WiFi](https://community.cambiumnetworks.com/u/WISE_WiFi) #### Post date: [December 30, 2020, 11:23pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/6 "2020-12-30T23:23:00Z")
Thank you for replying. Do you know if we can upgrade 3.5.6 straight to 4.5.6? Or do we need to step it up? ---
### Author: ![Eric\_Ozrelic](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/eric_ozrelic/32/16188_2.png) [@Eric\_Ozrelic](https://community.cambiumnetworks.com/u/Eric_Ozrelic) #### Post date: [December 30, 2020, 11:37pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/7 "2020-12-30T23:37:23Z")
I think you can go straight to 4.5.6… and IIRC, you want to do the SM’s first and then the AP. ---
### Author: ![rodneyt72](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/r/96bed5/32.png) [@rodneyt72](https://community.cambiumnetworks.com/u/rodneyt72) #### Post date: [December 31, 2020, 3:37pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/8 "2020-12-31T15:37:16Z")
We use 4.4.3 on all of our radios. I haven’t had any luck with anything below this other than 3.5.6. But 4.4.3 seems to be where we are staying (for now). I would like some feedback on newer FW. Anyone know how 4.5.x works out for you? Correct any problems? Seeing any problems with it? ---
### Author: ![ninedd](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/n/57b2e6/32.png) [@ninedd](https://community.cambiumnetworks.com/u/ninedd) #### Post date: [December 31, 2020, 8:20pm UTC](https://community.cambiumnetworks.com/t/notice-need-for-epmp-upgrade/74457/9 "2020-12-31T20:20:23Z")
We are having no deal breakers with 4.5.6 or with 4.6BETA. We have 14 days uptime on 4.6-RC35, with no reported issues.