Like to stick my nose in. Hold on stop there. Customers wireless is slowwwww. Wired is fine. Notice a power inserter in coax like for an amp. I know this is wrong power pack for current amps in our area I have spares because I collect them. Swapped it and speed corrected. I know improper power pack causes forward snr and signal issues for cable CPE. Could modem detect this rf issue and curtail speeds or WiFi performance. I know they go into partial service mode with poor rf. Maybe keeping voice active. You guys know any more about this?