Because I purchased a (supported) cable modem from a third party, my ISP won't provide services which are supposed to be included in my service.
Their systems don't "recognize" my cable modem as existing on their network, so services that should be provided through my link are denied, claiming that my devices "aren't on the network."
It's a huge scam. We need real competition in internet service providers.
Not a bad idea. But since I don't actually use the services I'm not getting, I'll likely just vote with my wallet instead.
Actually, where I live there is competition.
In fact, there is a second cable ISP in my apartment building.
What's more, in addition to the cable ISP I have (Spectrum), I have a DSL link (Fusion) as well.
I'd dump Spectrum (and tried to do so), but long term construction has blocked access to the access points for my building, so I'm stuck with them for now.
Once the scaffolding blocking access is removed (it's been up for more than three years), Spectrum will be history for me.
Even more, Verizon has been claiming they're trying to get access to implement FIOS in my building, but I think they're lying since they were able to site a cell tower on the roof a couple years ago.
However, I live in the most densely populated city in the US.
In most other places in the US there are, at most, two ISPs which provide service. Usually a cable provider and a DSL or Satellite provider.
That's what I meant be a lack of competition. My apologies if I didn't make that clear.
The more complicated matter is that firmware is typically delivered to the modem via the DOCSIS management protocol (lower level than TR-069) and so the ISP must have firmware available for all supported modems. This is the major factor that leads to compatibility lists. It is possible for the ISP to not manage firmware but most don't want to take the risk as a malfunctioning modem can take down a neighborhood in some cases.
The worst case scenario is a poorly secured cable modem gets infected by malware, then infects a bunch of other cable modems before switching to "take down the neighborhood" mode in which it transmits random garbage onto the cable. Since the cable is a shared resource, any misbehaving modem can prevent all others being able to connect.
Perhaps just 1% vulnerable modems across the USA, and most people's home internet would be offline for weeks until whoever in every single neighborhood has an infected modem is identified and unplugged.
Considering that, I can completely see why they wouldn't want you using a cheapo modem you got from Walmart.
I don't see many (any?) people trying to connect their own GPON equipment to GPON fibre networks.
The equipment ISP provided isn't very powerful and will likely overheat and degrade the connection if you use it so violently.
In most case I guess people just plug their own router after the GPON and don't bother what is the GPON doing.
No need to transmit all the time to cause disruption... You could for example repeatedly transmit packet headers followed by a long break, and collision avoidance algorithms would stop any other device transmitting.