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Several different protocols are used on top of ATM. The protocol required in your
configuration depends on the equipment deployed by your DSL service provider.
There are several possibilities:
1. Point to Point Protocol (PPP) Over ATM (RFC 2364)
PPP provides session setup, user authentication (login), and encapsulation
for upper layer protocols such as IP (Internet Protocol). The use of PPP
makes the modem appear as a dial modem to the operating system. Dial-Up
Networking is used to establish a connection. The WAN (Wide Area Network)
driver and the ATM driver support PPP.
2. Bridged/Routed Ethernet/IP over ATM (RFC 1483)
This protocol makes the modem appear as a local area network (LAN) device
to the operating system.
3. RFC 1577
This is a local area network protocol which supports IP to ATM and ATM to IP
address mapping.
4. Point-to-Point Protocol (PPP) Over Ethernet (RFC 2516)
This protocol, commonly called PPPoE, allows multiple computer users on an
Ethernet to share a common DSL connection to the Internet. The WAN, LAN,
and ATM drivers support PPPoE. Refer to
for more details.
Three types of device drivers are provided for the ADSL USB modem, WAN,
LAN, and ATM.
Note: All three drivers support ATM protocol. In addition, the ATM driver works
with ATM services that are available in recent Windows operating systems.
The proper choice of driver depends on the combination of Windows
operating system and protocol.