Chapter 1: Understanding ISDN and the Express XL/XLT

Network Address Translation Mode

NAT is a special mode of operation in which the Express XL/XLT obtains a dynamically assigned IP address from the peer router (typically an Internet Service Provider). This allows a network of computers to benefit from Ether- net to ISDN speeds while still appearing to the Internet Service Provider (or central site router) as a single IP address which is typical of PC based serial dial-up solutions.

A call is initiated to the ISP using the Dial menu or demand for a Connection List profile that has the IP parameter NAT set to Yes. The network computer’s IP stack may use DHCP to request an IP address, default gateway address, and domain name server addresses from the Express XL/XLT.

Front Panel

Figure 1-6on page 17 shows the front panel of the Express XL/XLT. The indi- cators are divided into LAN functions, WAN functions, and Test functions.

LAN Indicators

 

RX

Flashes when receiving data from the 10BaseT connector.

TX

Flashes when transmitting data onto the 10BaseT connector.

LI

Link integrity. Illuminates when there is a good connection

 

between the Express XL/XLT and the Hub/NIC card.

COL

Illuminates when a collision occurs on the 10BaseT.

JAB

Indicates a jabber condition on the 10BaseT.

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Express XL/XLT User Manual

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ADTRAN Express XLT user manual Network Address Translation Mode, Front Panel, LAN Indicators

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.