@Terran158 

Ok, a bit to unpack here.

Most current residential gateways from the Big 3 in Canada, Bell is no exception, absolutely *SPAM* the airwaves.  These devices have 5 or more radio modules inside them, less than half of which the user has control over.  What this means is that if you use the HH as one of your active APs, then in 2.4g band, that broadcasts on 1 of the 3 non-overlapping channels, and the internal hidden SSID (which I believe is for the TV) broadcasts on the second of 3 non-overlapping channels.  Same in the 5.8Ghz space, that HH is blasting on two channels, and usually the ones that permit the most power.  Via user control, you can disable the onboard 'user' radios, but that still leaves a 2.4G, 5.8G and a Zigbee or whatever going at full tilt.  Hate it.  My solution was to remove the ONT (fibre interface module, in SFP formfactor) from the HH3000 unit and using a media converter from TPlink, connect that to my ER605's WAN port.  You cannot do this with the HH4K and newer hubs...which you've probaby just upgraded to if you went past the 1.5Gbps speed which I think is the max for that Nokia ONT SFP module.  Rant mode off.  So yeah, keeping that residential box around in an enterprise environment isn't a great idea...not that you have much option sometimes.

My advice would be to extract the SFP from the HH3K if you still have that hub model and plug it direct into your Omada solution (I can share my configs etc...but it's pretty easy).  Failing that, I would disable all user WiFi on the HH box, and then build it a nice little cement house out of cinderblocks lined with tinfoil in the corner of your buiding basement...  A single Omada AP can replace what that box is doing with much more configurability and style and a cr4p ton less interference.

If you have IP TV boxes or heaven forbid Bell IP phone service...Omada can handle the split using the built in IPTV feature in the Omada gateways.