Figure 2-7: Au-Idu Module Front Panel - Nera WILINK I System Manual

Chapter 2 - Installation Guidelines
2.2.7 Access Unit Indoor Module (AU-IDU)
The double Euro Access Unit IDU module contains the wireless IEEE 802.16a
MAC and modem and is responsible for the wireless network connection
establishment and for bandwidth management. Each AU-IDU includes two
3.5/1.75 MHz PHY channels that can connect to AU-ODUs. If only a single
AU-ODU per AU-IDU is used, it should be connected to the ODU1 (Channel 1)
connector.
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Figure 2-7: AU-IDU Module Front Panel

WILINK I MODULAR BASE STATION SYSTEM MANUAL