User Manual

Chapter 2 - Installation Installing the Base Transceiver Station (BTS) Equipment
4Motion 83 System Manual
2.3.8 Network Processing Unit (NPU)
The NPU module serves as the central processing unit that manages the BTS'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. In addition, the NPU can be operated in ASN-GW mode, in
which case it also implements ASN-GW functionality.
Figure 2-26: NPU Module Front Panel