Do the following:
Power off your hub. Wait a couple of minutes and disconnect from the line.
Disconnect all phones.
Wait 30 minutes and power up the hub - and leave for another five minutes
Plug in the line connection to the hub, and again wait for 5 minutes.
Then check your line stats again.
That should at least try to get you back to 6dB and then over time it might work down to 5, 4, 3 dB.
M H C
taurus excreta cerebrum vincit
Edited by MHC (Wed 01-Jul-20 15:52:22)