Fusion Expansion Hub; Expansion Hub Overview; Figure 4-1 Expansion Hub In A Fusion System - ADC InterReach Fusion Installation, Operation And Reference Manual

SECTION 4
4.1
Downlink Path: The Expansion Hub receives downlink (Band1, 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.
Fusion Main Hub
Uplink Path: The Expansion Hub receives uplink (Band1, 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.
D-620610-0-20 Rev D

Fusion Expansion Hub

This section contains the following subsections:
• Section 4.1 Expansion Hub Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
• Section 4.2 Expansion Hub Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
• Section 4.3 Expansion Hub Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
• Section 4.4 Faults, Warnings, and Status Messages . . . . . . . . . . . . . . . . . . . 4-9
• Section 4.5 Expansion Hub Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

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.
Expansion Hub in a Fusion System
Figure 4-1
Downlink to Expansion Hub
Fusion Expansion Hub
Uplink from Expansion Hub
InterReach Fusion Installation, Operation, and Reference Manual
Downlink from Expansion Hub
RAU
Uplink to Expansion Hub
CONFIDENTIAL
4-1