Lately, we have had a few clients run into signals becoming worse when they elevated clients to ePMP. This is not a result of the software being bad, but it enforcing the max EIRP on the units. This boils down to older devices compliant with original FCC grants which allowed unlimited EIRP. The Cambium elevate recognizes the latest grant for the devices. This grant allows for a max of 41 dBM on 5/10/20 mhz channels and 38dBM on 40mhz.
So if you have elevated some older devices from UBNT your signals may have dropped. This is due to compliance with the latest rules for the device. As our industry matures, becoming compliant will become more and more important. On the UBNT units, newer firmware from UBNT also does this.
Cambium has a forum post on this. http://community.cambiumnetworks.com/t5/ePMP-Elevate/5-8-GHz-Elevated-Devices-Maximum-EIRP-in-the-United-States/m-p/73141#M475
We have some tricks of the trade we can do. Contact MTIN for how we can help.