You are right to say that the beeping sound is caused by a faulty internet connection.
Have you configured your pool? Can you access the miner with its IP address?
I can't even access the configuration page of the antminer because I don't know its IP, I used the software Ipreporter and even checked the DHCP list on my router's configuration panel but I couldn't find anything.
I've just tried to connect it directly to my modem instead of using the powerline adapter but the same thing occur, red light and a beeping sound after 5-10mins.