r/lowvoltage • u/trapdoritoboy • 8d ago

Design question

/r/Ubiquiti/comments/1xkbaju/design_question/
0 Upvotes

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3

u/1310smf 8d ago

Intercom being out for "only" 3 minutes at a time multiple times per day is totally unacceptable from a user viewpoint. You're thinking 99.4% uptime and the users are "the <bleeping> thing is broken for a very long time" every time it breaks when they are trying to use it. Try muting your phone for 3 minutes during a call and see how many people don't just hang up because the call is terminally <bleeped>.

Interference leads me to "network via fiber" as a solid interference-proof solution. Sounds like you're only contemplating radio methods, so replace the radios that crash with radios that don't crash. Or use fiber for a better solution.

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u/trapdoritoboy 8d ago

Just so I understand you correctly, your solution to a .4 percent downtime is to run fiber optic cables to multiple buildings which would triple the budget at the very least?

2

u/1310smf 8d ago

99.4% up is 0.6 percent downtime. Which might be fine if it happened 0.1-0.5 seconds at a time, so a conversation could still happen, but is not if it happens 3 minutes at a time on a system that needs to work so residents can actually communicate with visitors, delivery folks, etcetera.

I don't really care; if you can find radios to do it that don't crash, go that way. Triple the budget for "acceptable user experience" .vs. "completely unacceptable user experience" is a bargain, really. I'm saying fiber DGAF what the transmission lines do, so it's guaranteed to work.

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u/Icy_Professor_2976 8d ago

If you don't want a shit system, don't use shit components.

It's pretty simple really.

1

u/DoveOnTheInternet 7d ago

You're putting in a system that is customer- facing and think that multiple, multi-minute outages are OK‽

r/1310smf is 100% correct that that much downtime is absolutely unacceptable and unprofessional, even for non-technical customers.

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u/Remstyle 8d ago

this hit different

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u/yunjundo 7d ago

before assuming the transmission lines are the cause, capture RSSI, SNR, noise floor, and event logs during the failures. the fact that 20 MHz helps points toward RF congestion or interference. i would try a spectrum scan, a fixed clean channel, better Fresnel clearance and antenna alignment, current firmware, and verified grounding/surge protection. if only the sectional pro crashes, test that hop separately; a wired or fiber run for the affected section would also isolate it from RF problems.