ADSL Advantages:
- ADSL is "rate-adaptive", the speed depending on distance and line characteristics. It will decrease if the line's parameters (noise, impedance etc) rquire so;
- Guaranteed Bandwidth - the network topology allows for a minimum bandwidth to be supplied, independent of the network's load;
- Service Integration : several services, such as Internet, VoIP, Videoconference, conventional telephony can be integrated on a single connection, thus significantly reducing a company's operating costs;
- VPN - it is possible to develop metropolitan or national Virtual Private Networks. The companies that operate several POPs (Points Of Presence) can establish fast and secure connections between these remote locations;
- Increased security - unlike the CATV or Ethernet based networks, ADSL allows for the subscribers' logical separation.

The following diagram depicts the basic configuration of an ADSL network DIAGRAM