Alcatel-Lucent 408154904 CPU/Companion Rear I/O Card – Complete Overview
The Alcatel-Lucent 408154904 is a specialized CPU/Companion rear input/output (I/O) card designed for carrier-grade telecommunications processing platforms. This module serves as a critical interface between the main processor cards and the system backplane, providing signal routing, power distribution, and diagnostic connectivity. It is an essential component for ensuring reliable communication between processing modules and the rest of the chassis infrastructure.
Physically, the 408154904 is a full-height, rear-mounted card that plugs into the backplane of the chassis. It features multiple high-density connectors that mate with the front-mounted CPU or companion cards. The card provides a passive or active signal conditioning path for high-speed digital buses, including PCIe, Ethernet, and serial control interfaces. It includes onboard termination resistors and impedance matching networks to maintain signal integrity across the backplane.
The card also serves as a power distribution board, routing -48 VDC from the backplane to the processing modules with individual overcurrent protection and filtering. It includes status LEDs for power presence, fault, and activity, providing visual confirmation of operational status. A test header allows for voltage measurement without removing the card.
For maintenance and diagnostics, the 408154904 includes a field-programmable gate array (FPGA) that monitors backplane voltages, temperatures, and connection integrity. The FPGA communicates with the system management controller via I²C, providing real-time status and enabling remote fault isolation. It also supports hot-swap insertion and removal, with controlled power sequencing to prevent inrush current spikes.
Mechanical design is rugged, with a steel faceplate and robust ejector handles for secure seating. The card is keyed to prevent incorrect installation and includes a retention screw to secure it against vibration. It operates in temperatures from 0°C to 50°C with forced-air cooling.
Compliance includes NEBS Level 3, CE, and RoHS. The card is designed for long-term reliability with an MTBF exceeding 500,000 hours.
Typical applications include use in Alcatel-Lucent's 7750 SR routers and other chassis-based systems where rear I/O is required for physical connectivity. The 408154904 ensures that CPU and companion cards can communicate seamlessly with line cards and fabric modules.
In summary, the Alcatel-Lucent 408154904 is a reliable and essential rear I/O card that provides the physical and electrical interface needed for high-performance telecom processing, ensuring system stability and maintainability.
