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About GoncaloC
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Jun 13 2022
2:32 AM
Hi all, For some sites in my organization the dashboard is reporting for some clients low dates (around 7% or 8%) with SNR of +40db and RSSI of -48dbm. To my understanding the SNR and RSSI values are good, thus i dont understand how can some clients have very low data rates. What would be the approach to troubleshoot this, what should i be looking for to identify what is causing low data rates? TIA
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Nov 30 2021
12:02 AM
Thank you very much for all your feedback, it is really valuable input for me.
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Nov 18 2021
1:03 PM
Hi, thanks for the reply and for sharing those tips, which are what we are doing exactly and yet i have seen some macbook laptop connected to the farthest access point. I though of increasing the minimum bit rate but i have the feeling that by doing so i will end up causing more problems than solving. On these site in particular that as 4 floors with 4 APs on each floor, apart from the dashboard showing that i have 659 interfering APs when i look at the spectogram and see transmitions on every 5 ghz channel the only thing that comes into my mind is interference. Its 10 in the eve, where i am from and there is no one in the office, a part from a couple of IOT devices which use 5ghz and i have this beatifull spectogram show transmitions on every channel. Isn't this most likely a sign of interference?
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Nov 18 2021
12:32 AM
Hi, thanks for your reply. They are indeed different AP models the first one is a MR32 whilst the second is a MR52, probably this is the reason why the waterfalls are different. Regarding the channel width i double check and we use 20 Mghz across all our organization. This is somewhat the recommendation since we have more channels and this way we can avoid interference, i guess .. 🙂 Regarding the second sample i do not understand what are those continuous vertical lines, could they be from a device that is 24/7 transmiting signals, since they dont go way never. BTW: the scroll bar only appears on the MR52 Regards
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Nov 17 2021
5:53 AM
Hi All, i have some users on one of my company sites that are complaining a lot about the WiFi network. I have noticed on 1 of the floors that a specific access point is report extremely high latency, however in client health the DB signal is above the 32 DB. Wich according to Meraki documentation the signal should above 25 DB for applications that use Voice and thus, i conclude that a 32 DB is not excellent but good, which i understand its ok. This users complain about poor video calls, and since the dashboard reports a good signal reception the only thing that came into my mind is that there might be interference. I have run a couple of spectrum analisys and i wonder how can i actually detect the precense of interference. On these sample i do think that there might be interference on ch 140 since i only have 1 AP on that channel and it looks like there is non stoping transmition on that channel. however on channel 36 i can observe some gaps between the horizontal lines and there is no interference on this channel, right? On these other sample i see some vertical lines on ch 112, 64, 48 which i do not understand what they could possibly mean. Could some one help me to understand it? Both access point are on the 20 channel width and i dont understand is why on the first sample i see less channels than on the second. Regards
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Interference
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RF Spectrum
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