Fujitsu 3XAX-00803AAS user manual Introduction Commercial Confidence

Introduction In Commercial Confidence

ADSL modems employ ATM (Asynchronous Transfer Mode) framing. ATM is a protocol that divides packets into small fixed sized cells for rapid transmission over high-speed networks. The ATM protocol allows various types of traffic (e.g. data, voice, and video) to be securely and efficiently carried over the same network. ATM is being widely deployed by telecommunications carriers in their backbone networks. Two type of ATM connections are possible, PVC (Permanent Virtual Circuit) and SVC (Switched Virtual Circuit).

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:

•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-up modem to the operating system. Dial-Up Networking is used to establish a connection. PPP is supported by either the WAN (Wide Area Network) driver or the ATM driver.

•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.

•RFC 1577 – this is another local area network like protocol for IP address and ATM address mapping.

•PPP Over Ethernet (RFC 2516) - This protocol makes the modem appear as a LAN device to the operating system. It allows multiple computer users on an Ethernet to share a common DSL connection to the Internet.

Three types of device drivers are provided for the ADSL USB modem, WAN, LAN, and ATM. 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 Windows1 operating system and protocol.

•WAN – this driver causes the modem to resemble a dial-up modem. Call establishment is performed through Dial-Up Networking. This driver supports RFC 2364 with PVC connections. It can be used with Windows 98, Windows 98 SE, Windows 2000, Windows ME and Windows XP.

•LAN (RFC 1483) - this driver makes the modem appear as a LAN or Ethernet device. Connection establishment is automatic. This driver supports RFC 1483 with PVC connections. Additionally, PPPoE is supported. It can be used with Windows 98, Windows 98 SE, Windows 2000,Windows ME and Windows XP.

•ATM – this driver works in conjunction with ATM services provided by Windows. Both RFC 1577 and RFC 2364 are supported. The ATM driver uses Dial-Up Networking to create a PVC or SVC connection to establish a PPP (RFC 2364) connection. This driver can be used with Windows 98 SE, Windows 2000,Windows ME and Windows XP.

The device driver choices are summarized in Table 1-1:

1.Microsoft, Windows, Windows 98, Windows 98 SE, Windows 2000, Windows ME and Windows XP are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

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Issue 02 March 02	FTEL