Alcatel Lucent TN801B Board

The Alcatel Lucent TN801B Board is a versatile digital interface module designed for use with OmniPCX and other Alcatel-Lucent enterprise telephony systems. This board provides high-density connectivity for digital trunk lines, enabling seamless integration with public switched telephone networks (PSTN) and private voice networks.

Digital Trunk Interface

The TN801B supports both E1 (30 channels) and T1 (24 channels) framing formats, making it suitable for global deployments. It incorporates ISDN Primary Rate Interface (PRI) with Q.931 signalling, as well as R2 and CAS protocols for legacy interoperability. The board offers full duplex operation with built-in line equalization and jitter attenuation, ensuring clear voice transmission over long distances.

High-Density and Scalability

With a single slot footprint, the TN801B can handle up to 30 simultaneous calls, significantly increasing the trunk capacity of the host system. Multiple boards can be installed in a single chassis to support hundreds of trunk lines, making it ideal for large enterprises, call centers, and service providers. The board is hot-swappable, allowing for expansion or replacement without system shutdown.

Signalling and Protocol Support

The TN801B is equipped with advanced signalling processors that handle protocol conversion, call setup, and tear-down efficiently. It supports both Euro-ISDN (ETSI) and NI-2 variants, as well as QSIG for private networking. The board also provides comprehensive echo cancellation and voice compression options, enhancing voice quality on long-haul connections.

Redundancy and Reliability

Designed for mission-critical environments, the TN801B features redundant clocking inputs and automatic failover to backup routes. It incorporates extensive diagnostic capabilities, including loopback tests, bit error rate monitoring, and alarm reporting. The board's robust power supply and thermal management ensure stable operation in high-density chassis configurations.

Compatibility and Integration

The TN801B is fully compatible with Alcatel Lucent OmniPCX 4400, OmniPCX Enterprise, and other IP-PBX systems. It integrates seamlessly with existing digital and IP gateways, providing a bridge between traditional TDM networks and VoIP infrastructures. The board is also supported by Alcatel-Lucent's management suite, offering centralized provisioning, monitoring, and fault management.

Deployment Use Cases

Common applications include connecting to central office exchanges, interconnecting branch offices via private leased lines, and providing DID (Direct Inward Dialing) numbers for employees. The TN801B is also used in disaster recovery configurations, where it can reroute traffic through alternate trunks in case of network failures.

Technical Specifications

The board operates on standard -48V DC power and consumes low wattage. It features LED indicators for link status, carrier detection, and alarm conditions. The TN801B meets industry standards for electromagnetic compatibility (EMC) and safety, including FCC Part 68 and CE marking.

Conclusion

The Alcatel Lucent TN801B Board is a reliable and feature-rich digital trunk interface that enhances the connectivity and scalability of enterprise telephony systems. Its high channel density, protocol flexibility, and robust design make it a preferred choice for organizations seeking cost-effective and dependable PSTN integration.