Appendix B: Log Messages

Bandwidth drop level 4

The Express XL/XLT is dropping a B-channel call in order to reduce band- width.

Bandwidth request level 4

The Express XL/XLT is dialing another B-channel in order to increase band- width.

Bandwidth Restore level 4

The Express XL/XLT is re-dialing destination to restore original bandwidth after POTS call bump or unexpected call drop.

Bearer Info Cap Incorrect level 2

The bearer capability received in an information element from the switch was invalid.

Bearer Mode Incorrect level 2

The bearer mode received in an information element from the switch was in- valid.

BUSY level 2

Called location was busy.

Call lost <number> level 5

The Express XLT attempted retrieve a previously held call but the call was lost for unknown reasons. If no caller ID is available for the ISDN line, then <num- ber> will be blank for incoming calls.

Caller ID mismatch level 3

The caller ID number did not match the numbers placed in Configuration/ Connection List/Authentication parameters Call ID 1 or Call ID 2.

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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.