The Alcatel CPU5 (model 3BA23071) is a central control processor card designed for use in Alcatel telecom and PBX chassis. It is typically paired with the IO2 module (3BA23050) to provide expanded I/O connectivity. This combination forms the core processing and interface backbone for systems such as OmniPCX and other Alcatel communication platforms.
The CPU5 card houses the main processor, system memory, and internal interfaces for controlling the chassis. It runs the system operating software and manages all line cards, trunk interfaces, and peripheral modules. The IO2 module provides additional I/O ports—such as Ethernet, serial, and alarm contacts—to enhance connectivity with external management systems and external devices.
High‑performance embedded CPU for system control
On‑board DRAM and flash for software and configuration storage
Redundant operation support (hot‑standby)
IO2 module adds Ethernet, RS‑232, and alarm interfaces
Hot‑swappable for maintenance
Management via CLI, web, and SNMP
Processor: 32‑bit RISC, ≥ 500 MHz
Memory: 512 MB DRAM, 256 MB flash
CPU Card Interfaces: Backplane bus, alarm relay
IO2 Module Interfaces: 2x 10/100 Ethernet, 2x RS‑232, 4x dry contact alarm inputs
Power Supply: -48 VDC from backplane
Power Consumption: 25 W (CPU5) + 10 W (IO2)
Operating Temperature: 0°C to 45°C
Dimensions: Standard chassis slot
This processor and I/O set is used in Alcatel telephony servers, access nodes, and small‑to‑medium PBX installations, providing central intelligence and external connectivity.
Insert the CPU5 card into the designated slot, attach the IO2 module to the dedicated connector, and secure. The system will automatically boot. Maintenance includes software upgrades and monitoring system logs.
The Alcatel CPU5 with IO2 set delivers reliable control and connectivity for telecom platforms, ensuring stable operation and easy management.



