Users pay an access fee to use the service.
Anyhow, the charge usually includes an instruction manual, as well as some online credit. Sometimes the cost for connect time will vary depending on the speed of the modem you are using. They might also charge more or less depending on the time you are calling. You might be required to pay a fee for special access to some of the files, doors, or conferences. However it is worked, the charges are most easily billed to your credit card.