Figure 2-8: Npu Module Front Panel - Nera WILINK I System Manual

Chapter 2 - Installation Guidelines
2.2.8 Network Processing Unit (NPU)
The NPU module serves as the central processing unit that manages the base
station's components and the SUs served by it. It also aggregates the traffic from
the AU modules and transfers it to the IP backbone through a dedicated
Gigabit/Fast Ethernet interface.
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Figure 2-8: NPU Module Front Panel

WILINK I MODULAR BASE STATION SYSTEM MANUAL