Teams are able to pickup the walkie talkie from the enemies they kill.
And the opposing teams can listen to the conversation of the enemies and even communicate with them and trick them. I feel like this would be a cool feature. Or there could be this server room that the intruders can interact with and hack into the enemy comms and hear what they say. To make it less overpowered the intruders will have to find a code that is randomly placed in different locations.