The Nokia 472181A is the FSMF (Flexible System Module Fabric), a baseband processing and control unit for the Nokia Flexi Multiradio base station. Key features also include a compact, rack-mountable design, optional transport and power expansion modules, and compliance with various regulations.

• Role: Core baseband unit (BBU) for the Flexi Multiradio platform, handling baseband processing, signal management, and coordination.
• Capacity: Supports multiple sectors and carriers, with capacity expandable by adding up to two Baseband Expansion Modules (FBBCs).
• Multi-standard support: Capable of running GSM, WCDMA, and LTE concurrently.
• Ports:
  • Optical: Multiple SFP/SFP+ optical ports for RRU connectivity (e.g., 1-3GE(e)/1-3GE(o)) and an SFP expansion port.
  • Electrical: 1x S1 transmission RJ45 electrical port.
  • Internal: 2x QSFP internal connectors for baseband expansion.
  • Other: External alarm, synchronization, and local maintenance ports.
• Synchronization: Integrated GPS and 1588V2.
• Power: Optional power distribution sub-module with four power outputs (-48V).

• Dimensions: 447mm x 130mm x 420mm
• Weight: 15kg
• Form Factor: Compact, 3U high, 19-inch rack-mountable design.
• Cooling: Active cooling for high reliability.

• Modular expansion: Can be expanded with FBBC modules (for more optical ports and capacity) or FTIF modules (for additional transport features).
• Transport: Integrated high-capacity Ethernet transport.
• Compliance: Compliant with FCC Part 15 and EU RoHS directives.