Chapter 1: Overview

About ADSL

Asymmetric Digital Subscriber Line (ADSL) technology provides high-speed data access across regular phone lines (copper wires) by making use of previously unused frequency bandwidth above the voice band. By placing the ADSL signal above the frequency of the voice signal, ADSL service is able to coexist on the same line with your telephone service. ADSL is asymmetric in the sense that it provides a higher data rate in the downstream (receive) direction than in the upstream (transmit) direction. Asymmetric operation is ideal for typical home and small office use where files and information are downloaded more frequently than uploaded.

The ADSL USB Modem is capable of supporting the following DSL standards: ANSI T1.413 Issue 2, ITU G.992.1 (G.DMT), ITU G.992.2 (G.lite) and ITU G.992 Annexes A,B and C as applicable.

Protocol and Device Driver Selection

The ADSL USB Modem can be easily connected to a USB port on the PC via a standard USB cable. The ADSL USB Modem is fully software upgradeable so that new features and updates may be added by simply loading a new version of the device driver onto your PC.

ADSL USB 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:

1.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.

2.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.

3.Point to Point Protocol (PPP) Over Ethernet (RFC 2516) - PPPoE combines the Point-to-Point Protocol commonly used in dialup connections, with the Ethernet protocol, which supports multiple users in a local area network. The PPP Protocol information is encapsulated within an Ethernet frame. 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.

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Microsoft EA900 manual Overview, About Adsl, Protocol and Device Driver Selection

EA900 specifications

The Microsoft EA900 is a powerful and versatile enterprise-grade device designed to meet the demands of modern businesses. It integrates cutting-edge technologies and features that enhance productivity, collaboration, and security, making it an essential tool for organizations aiming to optimize their operations.

One of the standout features of the EA900 is its robust performance capabilities. Equipped with the latest Intel processors, including multi-core options, the device ensures smooth multitasking and efficient handling of resource-intensive applications. This enables professionals to run multiple programs simultaneously without experiencing lag or performance degradation.

The EA900 also boasts a high-resolution display, providing vibrant visuals and sharp clarity for all types of content. Whether for presentations, detailed spreadsheets, or graphic design work, the screen quality enhances the user experience, allowing for better focus and engagement. Coupled with advanced graphics technology, it is ideal for creative professionals who rely on accurate color rendering.

Connectivity is another area where the EA900 excels. With support for the latest wireless protocols and multiple USB ports, users can effortlessly connect to various devices and networks, ensuring seamless information sharing and collaboration across teams. The inclusion of HDMI and DisplayPort options also facilitates easy connections to external monitors, making multi-screen setups straightforward.

Security features are paramount in today’s digital landscape, and Microsoft has equipped the EA900 with a range of robust security measures. These include biometric authentication options, such as fingerprint readers, along with hardware-based security features like TPM (Trusted Platform Module). This ensures that sensitive corporate data remains protected against unauthorized access.

Moreover, the Microsoft EA900 is designed with user comfort in mind. Lightweight and portable, it is perfect for professionals on the go. Its durable build can withstand the rigors of daily use, and the long-lasting battery life ensures that users can work without frequent interruptions for recharging.

In summary, the Microsoft EA900 is an exemplary device that combines high performance, advanced security, and user-friendly design. As businesses continue to evolve and embrace new technologies, the EA900 stands out as a reliable partner in achieving organizational goals. Whether in an office environment or on the move, it supports the diverse needs of modern professionals effectively.