DB25 Male to Female RS232 Jumper Adapter Boxstar rating 5John KennedyAugust 30, 2010This little jumper box is perfect for those frequently needed adapters where the off-the-shelf "null modem" just doesn't meet your requirements. The "jumpers" need to be soldered in place, but plenety of jumper wires come with it. A life saver. A steal for $5.00!