Yah I have heard that only causes interference with the audio panel and is just another point of failure. It is for plugging in the handheld, but I have never used it and don’t even have the specialized cable. I might just toss it and down the road do something for the handheld later down the road. Same with the handheld mic , the avionics guy says with the modern audio panel I can’t keep the mic plugged in, if I need to, just plug in the mic in one of pilot or copilot com jacks