I think it might be your modem or land line.
I have used Aol for as long as I have had a useful ISP connection - and very seldom (almost never) have I had a disconnection.
Just occasionally, if I am sitting here staring into space, I may get a prompt Do you wish to remain online? As long as I click Yes, the connection remains.
When there was a BT failure in this neck-of-the-woods, the BT engineer phoned to see if we had a connection and I mentioned fairly slow speeds. He offerred to turn up the gain, I accepted and have had 48K plus connections ever since, plus downloads reaching (very occasionally) 5K/sec...........Wow, Roll on BB., ordered but not arrived yet.