Clear-Com HLI-FBS - Manual (Page 147)

13.7.2 Four-wire and control connection to radio system
To connect the HelixNet Partyline to a radio system using four-wire:
1) In the Modules Settings menu, select Slot n/Port A/B 4W > Channel Assign >
Channel # to assign the 4W port to a Channel, for example Channel A.
2) In the Modules Settings menu, select Slot n/Port A/B 4W > GPO Trigger >
Disable to set GPO Trigger to Disable for that 4W port.
3) In the Channels menu, select Channel # > GPO on Talk > Relay # to select a
Relay.
4) Connect the 4W audio and the configured Relay to the radio base station.
147 HelixNet Partyline User Guide