Cannot see AP side RSSI from SM?

I am new to Cambium ePMP and cannot seem to find where on the SM you could see the uplink or AP side RSSI and SNR. Also where can you see the link Quality and Capacity on the SM? Is it really only visible on the AP?

I am used to Ubiquiti where I can see link quality, capacity, RSSI, Mod rates, and SNR of both sides of the link from either the SM or the AP.

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I don’t think there’s a way to see the SM’s uplink RSSI to the AP on the SM side… just the uplink modulation.

Cambium doesn’t provide a link quality metric on the ePMP line. Probably the best way to see the SM’s performance over time is to watch the % of packets being transmitted at each MCS rate at the bottom of the Monitor → Performance page.

You’ll find that the ePMP UI is somewhat spartan compared to Ubiquiti’s. Cambium is making progress on the UI side, but I think they focus most of their development efforts on what’s under the hood.

Thanks. That is unfortunate as it makes troubleshooting a link harder. I would not say that Cambium needs to make their GUI as flashy as UI, but they could stand to provide a little more data in more convenient locations.

Having to navigate to multiple areas to get an idea on how a link is performing is obtuse to me as well as not providing simple information about the link on the main Status screen.

Honestly all they need to do to make things better in my opinion is adding a few things to the SM/AP Status page that are already elsewhere in the GUI. They can keep the rest the same.

  1. Small throughput chart
  2. RSSI for Downlink and Uplink - would be even better if it could be in this format the format of Signal (ch1/ch2) or -58 (-58/-61)
  3. SNR for downlink/uplink
  4. Link Quaility/Capacity
  5. Show what channel and channel width the SM is currently scanning for an AP on.
  6. For the AP provide the Station list or have the Registered Subscriber Modules number be a link directly to the Monitor->Wireless page.

^^^ THIS ^^^

OK, now you’ve done it… you’ve triggered another rant by me. :smiley:

(RANT) In a nutshell, I must say first that I LOVE CAMBIUM, because the ‘under the hood’ magic they can accomplish is just spectacular. The ePMP devices work better than anything else in the class that we’ve used for the last 20 years. They work when it’s -40c and they have a 3 year warranty, and they just work and keep working. :heart:

But Cambium’s virtual insistence on NOT providing information in a convenient and intuitive way is baffling. It amounts to a bleak desolate lack of essential information in my opinion… and when people like me bring it up, we’re usually told “Oh, I’d rather have the driver work, rather than a bunch of pretty graphs” which totally minimizes the value of essential data presented in a efficient manner. Why are those two things considered mutually exclusive? We should be able to have BOTH the best hardware & driver, and also the best GUI. (/RANT)

Anyway, Cambium is awesome in so many ways - hardware is reliable and performance is great and interference rejection and the list of things they do very well goes on and on too. :+1:

AND, I DO NOT WANT TO SCARE YOU OFF - stick it out, Cambium’s benefits are well worth the effort anyway, but I just wanted to jump on board and let Cambium know (again) that the GUI is an issue. It DOES and WILL scape customers off. @terintamel has been here 2 days, and is already is wondering why and where the info is laid out so inconveniently. :person_shrugging:


Whoops (RANT MODE) again.

This is EXACTLY what I’ve been saying for years! There are things that are already in the GUI, but not organized onto the same page, at the same time… there are literally times when I have to copy info down with paper and pen, so that I can switch to a different screen to see the other related data that really should be all on the same ‘pane of glass at a glance’ somewhere.

Here’s an example…the Spectrum Analyzer tool on the 3000/300 series has had a history of negatively affecting performance if it’s left running, especially if you have the mode set to Detailed mode. In 'Detailed Mode" it does a deeper inspection, and it can potentially cause problems (which is fair enough) so that mode is used for diagnostics, and it’s probably best not to leave it running it all the time. Fair enough / no problem with that.

SO – my suggestion to help with this problem… is that that info is already available in the GUI… (the info whether the SA is ON or OFF is already a known variable)… so lets just put an icon on the title bar of the GUI, maybe right up near were GPS & Connectivity Globe & User # icons in the GUI’s already are. Just put either a SA type icon there which is either Greyed or Colored and problem solved. None of us would accidently forget that the SA had been left on – or at the least, it would be very apparent and obvious “at a glance” if it was on or off. And/Or hey, let’s even make the SA state a condition we can read via SNMP or see in a column in cnMaestro or something - something we can poll and see if any devices accidently have their SA on right now?

And if feels to me that in a web based GUI, a small change like an ICON on displaying already known info on another screen, that seems like it should take an intern a day to add that in. Perhaps it is way more complicated than I think it is, but I can’t see why that should be difficult. That info is already known to the GUI, just duplicate it on another location.

Anyway (/RANT MODE)
Thanks for your time. :smiley:

PS – I do want to say yet again, I love Cambium’s products. Most of the time, the benefits of a better underlying hardware/firmware does outweigh the bleak GUI. But it just shouldn’t be mutually exclusive… it should be possible to have the best driver performance AND ALSO have the information laid out better. :smiley:


That is unfortunate as it makes troubleshooting a link harder.

HAhahaHahHAAhaha ! Oh man, it gets even better ! Not only is the UI poorly built, slow (compared to literally anything else) it actually makes up information ! That’s right , you think trouble shooting a customer’s connection issues are hard with the limited, slow, poorly laid out UI now just wait until you experience it telling you interfaces that are down are actually up or interfaces that are up are actually down ! IP addresses for interfaces when they don’t actually have addresses or claim it doesn’t have an IP address when it does OR the IP address is just wrong ! Do you use PPPoE on the CPE ? Well get ready for having no idea if PPPoE is actually up or down because just like any other interface it may or may not be showing you it’s correct state ! It’s GREAT !

Do you want to troubleshoot possible interference issues without having to drive to your customer’s location ? HAHAHAH ! The SA, which has what could be the most amazing SA/Site Survey tool ever made is also a crap shoot… Like the rest of the interface it is slow , unreliable, makes things up, crashes, freezes AND leaving it running can cause lots of problems for the radio BUT you have to leave it running because it’s sooooo slow to show you the data it may or may not be making up ! Also this SA that can crash your radio if left on doesn’t currently have an option to run for “x amount of time” and your techs will, without fail, leave it running on radio after radio after radio breaking things all over the network.

Absolute trash interface.

Also the “free” management solution cnMaestro they offer has gone to the " If it’s free then you’re the product" model in that even if you use the On Premises version instead of the cloud version you have to allow them to farm your data or it stops working. It’s also pretty much on par with the “Lowest Possible Effort” theme of the ePMP radios these days and also has trouble getting accurate information from ePMP radios…

So yeah, probably some of the best RF Hardware on the planet while being the worst at almost everything else.

Use Private , Incognito or whatever your browser calls it’s non-caching mode when working with ePMP radios unless you want to be amazed at just how weird things can get and how bad the ePMP UI really is.

Edit: No, really, do not touch the ePMP radios unless you are in private/incognito because once you do and they get things cached on your browser… you chances of seriously borking something because nothing on your screen is actually from the radio you think you are in go up considerably.

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