I just had the same issue im also with Vox - Ask Vox to get the line provider to upgrade the firmware on your ONT device - they can do this remotely
This solved my issue, Hopefully will work for you![]()
I'm on ADSL, my router is syncing at 13mbps but I only get 4.7mbps download speeds. This is for the last 3 weeks now. Telkom tested the line and all is fine. SNR and attenuation is also spot on. Vox data account.