No dial tone inside the home OR at the NID
I recently woke up the other morning to find my phone had no dial tone. When people call the number the phone itself doesn't ring, but on their end it just keeps ringing. I hear static on the line when I turn on the phone. DSL is still working as well. I then went to my parents and borrowed their corded phone and took it outside to test at the NID. After a few moments, the phone rang but no one was there and I suddenly had a dial tone, working both on the corded phone and the cordless phone inside. After a few hours, the line went dead again. I tried the corded phone out at the NID again, and now the corded phone won't even turn on to where I can use it (it's a really old phone, but it was working earlier). Ever since then, the line has had nothing but static and buzzing sounds. Any suggestions?