They still have SNR metrics on their end of the connection. And this is why providers hate heterogeneous networks :-) Mine politely asks you to plug in the ori

They still have SNR metrics on their end of the connection. And this is why providers hate heterogeneous networks :-) Mine politely asks you to plug in the original modem before they'll help you debug a connectivity issue. But even then, there are sometimes standards like TR-069 that apply across vendors.