I am involved in broadcasting for a school and want the two broadcasters to be able to communicate with each other through the headsets. We had this setup functioning properly on a laptop using a splitter until it randomly stopped working one day. Both the mics and the headphones work on the headset, they just can't communicate to each other. Any ideas as to why is stopped working randomly? How would you go about setting this up?
Does each headset/mic set work independently? You noted that both worked but if some intermittent connectivity lost is involved then perhaps one or other is not completely functional.
Try them again independently and add some gently twisting and bending around the connection points.
Look for an intermittent connection.
Also take a close look that the 3.5mm (1/8") male pins. Look for signs of damage: scratch, dents, bent....
If you are not familar with the connectivity; i.e., TS, TRS, TRRS (T= Tip, S = Sleeve, R = Ring) google and look for images of the pins/ports and wiring involved.
See if you can narrow down the problem to one headset/mic or the other.
Here is why we think both headsets work. If we go into settings, then to recording devices, and then turn on the setting "listen to this device," the headsets are able to communicate with each other. I can hear the other person and they can hear me. The problem is that when this setting is on, there is a feedback delay, so you hear yourself speak slightly after you said it. This makes it incredibly hard to speak, and it is not suitable for broadcasting. I'm not 100% but I don't believe the setting was on when it was working, but I definitely know that there was no delay.