User's Manual

Unison Expansion Hub PRELIMINARY
4-4 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0 Rev. A
4.1.1 RJ-45 Connectors
The eight RJ-45 connectors on the Expansion Hub are for the Cat-5/6 ScTP cable that
is used to transmit and receive signals to and from RAUs. Use shielded RJ-45 con-
nectors on the Cat-5/6 cable.
The Cat-5/6 cable also delivers DC electrical power to the RAUs. The Expansion
Hub’s DC voltage output is 36V DC nominal. A current limiting circuit is used to
protect the Expansion Hub if any port draws excessive power.
4.1.2 Optical Fiber Uplink/Downlink Connectors
The optical fiber uplink/downlink port transmits and receives optical signals between
the Expansion Hub and the Main Hub using industry-standard SMF or MMF cable.
The fiber port has two female SC/APC connectors:
• Optical Fiber Uplink Connector
This connector (labeled
UPLINK) is used to transmit (output) uplink optical signals
to the Main Hub.
• Optical Fiber Downlink Connector
This connector (labeled
DOWNLINK) is used to receive (input) downlink optical sig-
nals from the Main Hub.
CAUTION: To avoid damaging the Expansion Hub’s fiber con-
nector port, use only SC/APC fiber cable connectors.