ePMP 4500L TDD PTP Trouble

I know that TDD on the 4500L is still in beta, but we can not get it to connect at all.

ePTP connects, but when we switch over to TDD PTP, the client 4500L fails to connect with the error: Rejected - Incompatible Software Version.

Both devices are running 5.7.2.
We have tried Backward Compatibility mode, GPS Sync, and No Sync.

AP Config:


Client Config:
image

The end goal is to have two of these back-to-back sharing the same channel using TDD.

I must be doing something wrong or have an incorrect understanding of how these should work. Any suggestions on how to get these to connect?

If it was me - I’d try TDD Mode (in addition to the TDD PTP mode you’re trying) just to rule that in or out.

I’d also try 5.8.0 just incase you’re hitting some bug which has already been fixed between 5.7.2 and 5.8.0

https://community.cambiumnetworks.com/t/epmp-software-release-5-8-0-rc27-beta-is-now-available/100846

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Thanks for the suggestions.

I installed 5.8.0-RC27 on both ends, but the 4500Ls still would not connect on TDD-PTP.

I tried TDD and many combinations of Backward Compatibility, GPS Sync, Channel Size, and Ratio with no luck. The client radio reports “Rejected - Incompatible Software Version” every time.

ePTP continues to work fine on this link.

Has anyone successfully used TDD/ TDD-PTP on 4500Ls?

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We are having the exact same issue. Incompatible software version for PTP TDD
4500L pair in PTP latest 5.8 firmware NO GO. Has anyone found a fix to this?

I don’t know if this will fix what you’re seeing or not - but I’d suggest trying the 5.9 Release Candidate and seeing if that works. With all the improvements under the hood, maybe something has been already fixed that solves it. :man_shrugging:

https://community.cambiumnetworks.com/t/epmp-software-release-5-9-0-rc14-beta-is-now-available/

Hello @micahdeshotel ,

did you have a chance to raise a support ticket?
Or you can PM me techsupport files when it is in progress. I will try to figure out what is wrong!

Did you find the solution here? I have the same problem - also with 5.9.1 - but if you found the solution I will not bother creating a case…

Hi @sjordet and @micahdeshotel,

the fix is scheduled for FW 5.10. It is in early beta stage.
If you would like to try it, please, DM me and I will share the build with with you!

Hi!

Sorry for the late reply. I thought I would just wait it out, but after the beta for 5.9.2 came out, I just now realized that you wrote 5.10. Is there an ETA for that release? I would like to test it, if you could share what has changed and what could cause problems with it… :slight_smile:

Hello @sjordet,

the fix for 4500L and 4600L was implemented already in 5.9.2. The beta is available for download. Most probably it will be our stable version.
Thank you!

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I just tested TDD PTP on 5.9.2-RC5 on a pair of deployed ePMP 4500Ls, and it is working great so far.

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