Chapter 3: Terminal Menu Operation and Structure

Bandwidth/Upper Threshold Write security: 3; Read security: 5

This is the percentage of bandwidth that must be at least present on one B- channel before a second B-channel is added. The range is 0 to 100 and is in per- centages. The default is 80%, which is equivalent to 51.2 kbps. See the section Bandwidth/Samples (below) for more information on how the bandwidth rate is calculated.

Bandwidth/Lower Threshold Write security: 3; Read security: 5

This is the percentage of maximum bandwidth the bit rate must go below on two B-channels before one is dropped. The range is 0 to 100 and is in percent- ages. The default is 30%, which is equivalent to 38.4 kbps. See the section Bandwidth/Samples (below) for more information on how the bandwidth rate is calculated.

Bandwidth/Min Channels Write security: 3; Read security: 5

This represents the minimum number of B-channels that must be up for this Connection List profile. This value ranges from 0 to 2. The default is 0.

Bandwidth/Max Channels Write security: 3; Read security: 5

This represents the maximum number of B-channels this Connection List pro- file can have. The allowed values are 1 and 2. The default is 2. A value of 1 means that no extra bandwidth can be obtained for this connection.

Bandwidth/Samples

The parameters under this menu control the rate at which the Express XL/XLT samples the bandwidth on the B-channel(s).

Samples/Sample Rate Write security: 3; Read security: 5

This is the time between samples used for calculating data rates on the ISDN call. The value is in seconds and ranges from 1 to 255. The default is 5 seconds.

Samples/Samples Write security: 3; Read security: 5

This is the number of WAN data rate samples taken before a decision to change bandwidth is performed. The range is 1 (def) to 255 samples.

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ADTRAN Express XLT user manual Bandwidth/Samples

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.