I live in Sosua and have DSL (Internet Flash) from Codetel. You will have to check with them and see if the service is available where your house is located. When I contacted Codetel about the service I now have, I was told that before they could give me a firm answer they had to check to be sure it was available in my neighborhood.
Assuming you want to be connected round the clock, if you are with Codetel you need a combination of Internet Flash and the VIP plan. This will cost you about RD$1800/month, but there will be no additional cost for local phone calls.
I am pleased with the service I get. Very little down time, and they are responsive when you call with questions or problems. There is a toll free number to reach the Flash department with your questions and problems once you are on line.