Chapter 1: Understanding ISDN and the Express XL/XLT

be assigned under the Configuration/IP/NAT menu that allows incoming HT- TP, FTP, and mail server requests from the Internet to be translated and for- warded to this address on the user network.

Configuration

The Express XL/XLT is configured using a menu-based interface. This inter- face can be accessed via the maintenance port using any asynchronous VT100 terminal or personal computer running a terminal emulation program, or via the LAN using a Telnet client program. To use the Telnet interface, the Ex- press XL/XLT must first have an IP address programmed into it via the main- tenance port. The factory default is 10.0.0.1.

Security

Security on network devices is a major concern for almost anyone with a net- work. The Express XL/XLT provides many tools for securing the local net- work from hostile users. Incoming calls can be authenticated using passwords and Caller ID. A RADIUS client can also be used.

The Telnet configuration can also be protected using the same authentication methods. Each menu item in the Express XL/XLT has a security level associ- ated with it. A telnet session is assigned a privilege level which determines which menu items are accessible to the telnet client. See Security Levels on page 33 (in Chapter 3) for more information on menu security levels.

Filters can be defined to prevent certain addresses or protocols from being transferred from LAN-to-WAN, WAN-to-LAN, or WAN-to-WAN.

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ADTRAN Express XLT user manual Configuration, Security

Express XLT, Express XL specifications

ADTRAN has established itself as a leading provider of telecommunications solutions, and among its impressive lineup, the ADTRAN Express XL and Express XLT stand out as robust offerings designed for the evolving demands of modern networks. These devices cater to service providers and enterprises looking to enhance their broadband delivery capabilities while ensuring cost-efficiency and reliability.

The ADTRAN Express XL is a high-capacity, next-generation fiber optic access platform. It is engineered to support a wide array of technologies, including Passive Optical Network (PON) standards such as GPON and XGSPON. The Express XL's architecture allows for seamless scalability, making it a perfect fit for both small-scale deployments and expansive network rollouts. What sets it apart is its ability to deliver ultra-fast broadband services to residential, business, and mobile backhaul customers with its impressive throughput capabilities.

On the other hand, the Express XLT builds upon the success of the Express XL by incorporating advanced features aimed at maximizing operational efficiency. It supports technologies including Active Ethernet and offers flexible network configurations to meet specific service requirements. Both models utilize ADTRAN’s innovative Dynamic Bandwidth Allocation technology, which dynamically allocates bandwidth to users based on real-time demand, ensuring optimal performance and user satisfaction.

A key characteristic of both ADTRAN Express XL and XLT is their energy efficiency. Designed to minimize operational costs, these units use power-saving technologies that reduce energy consumption without compromising performance. Furthermore, they include built-in support for network functions virtualization (NFV) and software-defined networking (SDN), providing operators with the agility to adapt their networks in response to changing market conditions.

In addition to their advanced technological underpinnings, the Express XL and XLT boast an intuitive management interface, simplifying network monitoring and management tasks. They also feature comprehensive telemetry and analytics capabilities that help operators gain insights into network performance, optimize configurations, and troubleshoot potential issues before they affect end users.

Ultimately, the ADTRAN Express XL and Express XLT are pivotal components for service providers aiming to deliver high-speed broadband services effectively. With their blend of flexibility, scalability, and energy efficiency, these access platforms are well-positioned to meet the current and future demands of telecommunications networks worldwide.