Aiphone Corporation IS-MV. Video Master Station for IS series Local Hardwired Video Intercom. The IS-MV is a video master station with a 3.5" color LCD monitor. It can be wall or desk mounted (desk stand included). The IS-MV offers handset (duplex) and hands-free (VOX/ PTT) communication and can page up to 5 zones simultaneously. The unit is equipped with a door release button for the user to allow entry for the visitor. The IS-MV is also equipped with PTZ and brightness controls, giving the user control for camera angle and lighting to better see the visitor requesting entry. Six programmable speed dial buttons are also included for easy access to frequently called subs and paging zones. The IS-MV connects to the IS-CCU or IS-SCU using CAT-5e or CAT-6 cable and is powered by the controller.