TFIX Connections
From Zenitel Wiki
All electrical connections are made on the main board inside the housing.
Flowire connection
Each Ex Product features two Flowire connectors. Power and signal redundancy can be achieved by utilizing both Flowire connectors in an A-B system configuration.
Do not connect more than 9 Ex Products to each central Flowire Converter.
Only use one of the Flowire connectors on each Ex product for each central Flowire Converter.
Load sharing power supply must be used for redundant cabling solutions.
The main board receives both power and Ethernet signals through two wires. You can connect either A or B for connection to the rest of the system, or both A and B, each to a separate server, in order to achieve redundancy.
See "Turbine EX Connectors" for more details.