A jack and chassis assembly includes a baluns interface connected directly to the in/out wire wrap pins on the jacks. This helps to convert 75 ohm coaxial signals to 120 ohm twisted pair interface signals for equipment connections. The jack and chassis assembly includes at least one jack, a chassis defining a first frame holding the jack, a circuit board mounted to the first frame and in electrical contact with the jack, and a balun in electrical contact with the jack. Methods for assembling a jack and chassis assembly include mounting a jack onto a frame, providing a second frame holding a balun, and connecting the jack to the balun. A chassis assembly includes a first frame, and a second frame, with the first frame being mounted within the second frame. A method for servicing a jack assembly includes providing jacks mounted in a first frame in a chassis, providing a circuit board secured to the first frame and in electrical connection with each of the jacks, removing the first frame holding the jacks from a second frame supporting a panel of baluns electrically connected to the jacks, and providing a space between the plurality of jacks and the panel of baluns sufficient to permit service access to the jacks.