ADC Telecommunications Inc. F0694-011 Manuel D’Utilisation

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InterReach Fusion Wideband Installation, Operation, and Reference Manual
4-1
D-620616-0-20 Rev D
CONFIDENTIAL
SECTION 4
Fusion Wideband 
Expansion Hub
This section contains the following subsections:
4.1
Expansion Hub Overview
The Expansion Hub acts an interface between the Main Hub and the Remote Access 
Unit(s) by converting optical signals to electrical signals and vice versa, as shown in 
Figure 4-1. It also supplies control signals and DC power to operate the Remote 
Access Unit(s) as well as passing status information from the RAUs to the Main Hub.
Figure 4-1
Expansion Hub in a Fusion Wideband System
Fusion Wideband Expansion Hub
Fusion Wideband Main Hub
RAU
Downlink Path: The Expansion Hub receives downlink (Band 1, 2, and 3) optical signals from the Main Hub using fiber 
optic cable. It converts the signals to electrical and sends them to up to eight Remote Access Units (RAUs) using CATV 
cables. The Expansion Hub also receives configuration information from the Main Hub using the fiber optic cable and 
relays it to the RAUs using CATV cable.
Uplink Path: The Expansion Hub receives uplink (Band 1, 2, and 3) IF signals from up to eight RAUs using CATV cables. 
It converts the signals to optical and sends them to a Main Hub using fiber optic cable.
The Expansion Hub also receives RAU status information using CATV cable and sends it and its own status information to 
the Main Hub using the fiber optic cable.
Downlink to Expansion Hub
Uplink from Expansion Hub
Downlink from Expansion Hub
Uplink to Expansion Hub