Chosen Solution
Recently started getting “Check TEL Line” on the phone screens. Tried unplugging, resetting the modem, etc. Still shows up and no dial tone. Sounds like an open line though.
Try plugging the phones into a different line, if the issue persists, try an entire different phone, like a cheap one or maybe a really old phone if you still have one. If nothing changes, call your service provider and see if they can come out and figure out your issue. If this answered your question please hit the accept answer button!
Check the Tel line connecting the phone to your modem. Make sure it is connected to either Phone1 or Phone2 and not DSL
