The Quad E1/PRI WAN card without serial interfaces includes four RJ-45 ports for terminating 120-ohm balanced lines or 75-ohm unbalanced lines. Cables are not included with the card.A 10-position rotary switch allows the user to choose the number of ports that are terminated as 75-ohm unbalanced lines. If the LED labeled 120 at each port is on, it indicates the input impedance of that port is set to 120 ohms. If it is off, the impedance is set to 75 ohms.