Why ADSL connection with a new dial-up access to the Internet, using the local connection can not access

Users questions: Why ADSL connection with a new dial-up access to the Internet, while not directly connected with a local Internet access?
Experts answer: if you can access using the local connection, then you are a local area network, if using ADSL connection, you are outside the network
  • This information provided by the users.Thanks!