HelixNet: Can I wire a Sony CCU-D50 camera control unit to HelixNet via 4-wire?
The diagram below shows the wiring between a HelixNet 4W HLI-4W2 module and a Sony CCU-D50 camera control unit using a standard CAT-5 patch cable connected to the HelixNet 4-wire module. The other end of the CAT-5 cable is wired to the CCU via its DB-15 connector marked INTERCOM / TALLY / AUX.
Use the green and blue pairs (audio pairs) only to connect to the CCU DB-15 connector.
Set the CCU front panel intercom dip switches to 4-wire mode while the unit is powered off.
Note: A PDF of this solution is attached below. 
HelixNet 4W module Sony CCU-D50 Camera Control Unit
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