Residence Hall jacks typically have three plugs. The top, bottom left, and bottom right. If you use the wrong cable in the jack you may damage the jack. The top jack is A, and is for your phone. You should use an RJ11 cable (phone cord) for connection to your phone. The lower jacks are B (left) and C (right). These are data jacks for internet connection for your computers. You can connect to either B or C, depending on which one your roommate is using. You should use an RJ45 cable (Ethernet cord) for connection to the internet.
Last modified: July 25, 2018