rant..
i wish someone would sue spectrum.. it is very unfriendly to leave their damn routers in setup mode thus tying up many of the wifi channels.. They could easily disable it after a setup amount of time..
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If you accept Spectrum's equipment instead of providing your own, then you have accepted Spectrum maintaining control over it. Provide your own cable modem and router and then you will have control over it.
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i have my own.. thus the top of the list orbi.. but a couple of the spectrum setups are just as strong signal as my own.. thus the rant.
Ah, so neighbors, then. Maybe go to a local thrift shop, find some cheap routers, and offer to upgrade the neighbors to their own router? 
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yep condo on left of us common wall and one above most likely. and there is no reason they need to leave them in setup mode past say an hour or two.
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can i have your address and email. so i can refer them to you for support.. no way i am supporting neighbors .. it was bad enough when i had to support my parents wifi and cell phones.
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secondary rant. stupid builder put smoke detector on ceiling literall 4-5 ft from the oven.. and when heating stuff and open the door.. . etc.. need to add to my list to disonnect when arriving.. sigh
can you tell i am sick and ornery resulting from cold (not covid) from our recent trip to portugal.
next project moving modem, router , hub, weather station all connected to a ups which they killed .. (had to replace the batteries.) again builder issue.. outlet is on the same as the bathroom and at least twice a year they trip it and the battery discharges in the ups, and i have a service call to condo manager that the internet is out.. Moving into cabinet (after i drill) next to it that is on a different circuit.
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I suspect it's actually just people around you who never changed the default SSID when they set up their networks.
Sorta like how you left yours at the factory defaults of ORBI38 and ORBI62... 
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Sue spectrum for what, exactly?
Tough environment in crowded condo situation. Always a good idea to run ethernet wherever practical. I try to reserve WiFi for just nomadic devices like phones and tablets. I run ethernet to most TVs, cameras and so on. Unfortunately more and more devices are dropping ethernet though. For example some of my cameras don't have ethernet port so they must stay WiFi.
Getting your router elevated also helps. I put mine on top of a kitchen cabinet in central area of house (combined cable modem/router from Xfinity). I had to extend an RG6 cable to that location and then CAT6 back to my wiring closet for the LAN network switch. If using mesh Wifi, interconnect the modules/pods with ethernet for wired backhaul.
WiFi performance is largely dependent of carrier to interference margin (C/I). With the push to higher and higher data rates more complex modulation methods are used like 64 and 256 QAM which require more margin. So the presence of cochannel interference (your neighbors) and the larger margin required for high order modulation really makes it a tough dance. All you can really do is optimize your AP to device path and hope it has enough margin to reject your neighbors.
If the Orbi entries at the top are yours you should probably change the channel from 5 to either 1, 6, or 11. Those are the only channels you can ensure to atelast attempt to prevent overlapp on 2.4ghz. If you have two seperate devices i would also suggest using two different channels unless there is something with the mesthing on orbi that requires them to be the same. Otherwise they will potentially cause interference for each other. If anything is possible the best optionw oudl be to ask folks around you to see if they canturn down the transmit power of their routers. In many cases it is set too high, doesn't really help the communication much since the transmit power from the client is also important, and is just a good neighbor thing. If that is possible it reduces the range the AP screams the SSID and reduces interference.
As @a.mcdear suggested above those Spectrum SSID's are the default SSID's used during install. The customer may choose to use that or change it themselves. They are uniqe because along with the SpectrumSetup it also uses some randomized charecters. I would need to check what happened at my moms condo to be sure.
i have one of those spectrum routers in the closest.. those ssids are not the ones that are on the label on the device.. those only are used for setup and changes to the one that is on the device after setup.
i dont have 2 routers. the orbis are the same router one is the guest network from the older orbi i had so i didnt have to change all the devices in the condo when i got a newer one.
That’s not the case here in my area. I helped a neighbor with a technical issue who has spectrum and his SSID was spectrumsetup… and that was printed on the bottom of his router as well. Could have been a particular batch of equipment setup that way. So those SSIDs are legit ones being used by your neighbors not temporary setup ones.
Now why those folks don’t change it to something more meaningful I don’t get.
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it could be for convenience that is why i leave mine on the orbixx as there is a label with that on the router and a bar code to scan for renters to user it.. if i change it even if i print out a new code it may just be too confusing for them.
pretty sure its the same generation of routers i have as they are all the same provided in this condo complex.. once you complete setup it changes to myspectrumwifixxxx -xx
and that is what is printed on the bottom of ours.
and having the ssid spectrumsetup-xx does not make sense in the long run as that would mean there are only 256 .. and there could easily be overlap.
I run Unifi equipment at my home and live at the end of a culdesac so have many nearby neighbors. I just looked at its "Wifi Analyzer" and I see 5 Spectrum SetupXXXX SSIDs so again its not just your current location, equipment from Spectrum of a certain vintage defaults to this SSID.
As I said above it is also printed on the bottom of the router as well so my neighbors must have the same thought process of convenience and just using what is default and printed on the bottom of the router.
No need to sue anyone 
