it's a fax call from MyFax.com

calls every 4 minutes, just a beeping sound coming over

3 calls in a row starting at 4:15 a.m. Very annoying.

Same thing here. Calls out office lines over and over and over again with only that beeping noise when you pick up the phone. When you call back that number, the line disconnects. Tried to Google to find out where this number is from but I have been unsuccessful.

Get the same thing...driving me nuts!!