Who is the provider ,this is horrible , why can’t you get a router,modem combo
run it hardwired then like myself remove the noise ,digital is not grounded from house to house , Linear tube Audio. Make a great LPS power supply
removes all that garbage noise coming in up to 8 amps. Most are 4 amps or less 12 v ,and the pathetic wall wart power supply just ads more noise
then a decent Ethernet switch LHY -SW-8 has a temp controlled clock ,LPS ,
and low noise regulators Decent quality Ethernet cables ,your best one goes to your end point , then you start getting good sounding digital with a decent streamer
a good DDC after streamer a big plus also ,which I do all of the above ,remove all weak links in. The chain , being a dedicated Audiophile no stone goes unturned ,
land 100% makes a big difference.. p.s you can spend $4k just on a Ethernet switch like my brother has ,all depends how far you want to go l