Who else is having trouble with PMP450 disconnects in NLOS conditions?
For the past year or so I have been troubleshooting disconnect issues with clients that are NLOS or with partial obstructions. They tend to disconnect for 1 minute at a time multiple times per day if there is traffic on them. On the AP, the reg counter increments. the behavior is similar to locally ending a session that relys on a SM timeout. It's as if the session locks up in some way and when the client times out, it attempts to connect again. I'd like to note quickly, that I'm seeing this same behavior on all of my PTP450 links even though they are LOS, though different grades of LOS. The issue appears worse with higher traffic loads on links that have greater fresnel interference. Noise has a factor too, if it is present, but for now, I've tested in bands with -100dBm noise floors and confirmed that no other signals were present within 50Mhz.
I upgraded from PMP430 and PTP230. These are non-MIMO versions of the 450 line, which the 450 line is based on. They run in the same conditions without any disconnect issues. The major difference between the 430 line and the 450 line being MIMO.
I've focused on a single case, which is a 3Ghz PMP 450 SM that is less than 1 mile from a 3Ghz 450 AP. The signal travels through some trees for about 100ft. The signal is -65dBm. This is a good signal, but poor LOS. I see no reason this should not run stable.
Cambium, is there a way to turn off MIMO? This seems like the next logical troubleshooting step. I know you will ask me to submit my CNUT caputers, but I've already had multiple cases about this issue over the past year. It seems like I need to give more focus to the problem before any attention is paid to it. You're only suggestion to me over the course of our 450 use has been to try the 13.4 beta. You told me it addressed some disconnect issues. It seemed to help! But it didn't fix it completely. Whatever you did to 13.4, you probably need to do more. I think there is a modulation issue locking up sessions. It has something to do with MIMO or maybe 256... I don't know. Give me the ability to turn these things off and I can test.