Figure 2-9: Npu Module Front Panel - Alvarion BreezeMAX 3500 System Manual

Chapter 2 - Installation
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.
2-22

Figure 2-9: NPU Module Front Panel

BreezeMAX System Manual