Alcatel-Lucent 3AL94251AAAA03 FANS1000 Fan Unit

The Alcatel-Lucent 3AL94251AAAA03 FANS1000 is a high-performance fan unit engineered for active cooling and thermal management in optical transport network platforms and telecommunications equipment racks. This module provides forced-air cooling infrastructure to maintain optimal operating temperatures for installed line cards, service interface boards, cross-connect modules, control units, power supply units, transceiver boards, and other heat-generating components in transport shelf enclosures including the 1650SM, 1660SM, 1670, 1696MS, and related Alcatel-Lucent optical transport systems. The FANS1000 (Fan System 1000) implements redundant fan tray architecture with multiple high-efficiency brushless DC fans featuring variable speed control based on real-time temperature monitoring from distributed sensors throughout the shelf to balance cooling performance with acoustic noise reduction and power consumption optimization. The unit features integrated temperature sensors providing continuous monitoring of inlet and outlet air temperatures, internal shelf ambient conditions, and individual module temperatures with automatic fan speed adjustment and alarm generation when temperature thresholds are exceeded. Advanced features include N+1 or 2N redundancy with automatic failover, hot-swappable fan tray design enabling field replacement without service disruption, individual fan failure detection with status reporting to the shelf controller, intelligent airflow management with baffles and ducting to ensure uniform cooling across all installed modules, and filtered air intake systems to prevent dust and particulate contamination of internal components. The fan unit connects to the transport shelf backplane for power distribution via redundant −48 V DC feeds and for communication with the system control processor through I²C, SMBus, or IPMI interfaces for remote monitoring and management. Management interfaces include SNMP v3, TL1, and IPMI 2.0 protocols for integration with Alcatel-Lucent's 1350 OMS, NuWave EMS, and third-party data center infrastructure management (DCIM) platforms, providing access to fan speed RPM, temperature readings, airflow status, alarm conditions, and predictive maintenance alerts. The module features robust electromagnetic interference (EMI) shielding, conductive gaskets, and filtered ventilation to maintain electromagnetic compatibility and prevent contamination. Fan motors implement sensorless or sensor-based commutation with typical airflow capacities ranging from 100-300 CFM per fan depending on configuration, static pressure ratings of 0.5-2.0 inches H₂O, and acoustic noise levels below 65 dBA at full speed. Environmental specifications comply with ETSI EN 300 019 Class 3.1 and NEBS GR-63 Level 3 standards, supporting continuous operation in controlled telecommunications facilities with ambient temperatures from 0 °C to +45 °C and relative humidity up to 95% non-condensing. The FANS1000 is validated for deployment in Alcatel-Lucent 1650SM/1660SM/1670/1696MS/1830/1850 series transport platforms and ensures compliance with Telcordia GR-487, ETSI EN 300 386, NEBS GR-63, and IEC 60917 standards for telecommunications equipment cooling, environmental protection, and operational reliability.