Question:  My intention is to have one of the relays available on the GPIO DB-25 of a V-Series station activate whenever someone talks to that station.  The idea behind it is that a user can be listening to one of our recording headphone feeds and have their incoming intercom call switched into their headphones. I have logic controlled relays to perform the audio switching, I just need a relay closure out of the intercom station when a call comes in.
I can't quite figure out how to do that in EHX. Hopefully that is possible?

Answer:  Setting up a relay to trigger at a destination panel can be achieved by using the destination panel's Aux relay triggered by the destination panel port name used on other panels
1.    Go to Configuration / Controls menu on the left hand menu bar.
2.    Select “New” to generate a blank control key.  Rename it will a 10 or less character meaningful name.
3.    Now from the bottom section lefthand side of the controls screen (available) find the Panel Aux Relay tab and find the
       panel you want to trigger the relay on.
4.    Drag this relay from the available side to the righthand attached side. 
5.    Now Go to the Hardware / Cards and Ports menu, find the port of the destination panel and highlight the line to expose
       the advanced settings column on the right hand side of screen.
6.    Navigate to the last item, Attached control Options and open this menu. 
7.    Under secondary action scroll for the control label that was created in steps 1 to 4 and select it.
8.    Apply change to frame, the panel aux relay at the destination panel will now trigger any time a panel user talks to the
      destination panel by using the port name key of the destination panel.