UTC-515/520/532 User Manual 182.2 I/O Ports2.2.1 UTC-515A. Power Switch H. USB 2.0 x 4B. Antenna Port (USB 3.0 x 2 for UTC-515C/E)C. Line-out I. HDMI PortD. Mic-in J. VGA PortE. COM3 (UTC-515A/B only) K. LAN Ports x 2F. COM2 L. CFast Slot (UTC-515A/B only)G. COM1 M. DC input2.2.2 UTC-520A. Antenna Port H. HDMI PortB. Line-out I. VGA PortC. Mic-in J. LAN Ports x 2D. COM3 (UTC-520A/B only) K. CFast Slot (UTC-520A/B only)E. COM2 L. DC InputF. COM1 M. Power SwitchG. USB 2.0 x 4 (USB 3.0 x 1 for UTC-520D; USB 3.0 x 2 for UTC-520C/E)A B D F H K MLG JIC EA B C D E F G H I JKL M