Aiphone GT-2H Hands-Free Color Video Sub Station For Use With GT-2C Supports up to 500 tenant stations. The GT Series supports up to 500 tenant stations, which can communicate hands-free to a mAXimum of 16 entry panels and four security guard stations. The 170-degree entry station camera with PanTilt Zoom provides complete entry visibility. Choose from a one-piece stainless steel entry panel or easily configure the entry panels using either direct select or digital keypad.