High-level controlled airspace, in turn, exists from FL180 to FL600 in SDA. In NDA, however, the floor of Class A high-level airspace varies between FL230, in what is referred to as the Northern Control Area, and FL270, in what is referred to as the Arctic Control Areas.
Short for DVI (Digital Visual Interface) Integrated, DVI-I is the connection, or interface used between monitors and computers or home theater systems. DVI-I is used to interface with an LCD or CRT monitor display for digital video output. DVI-I supports both digital and analog. However, it will not use both at the same time. DVI-I detects and chooses digital or analog depending on the connected display. Contrast with DVI-D, which is a digital-only interface and DVI-A which is an analog-only interface.
DVI-D is the same cable as DVI-I without the pins or wires to carry the additional RGBHV signal. DVI-D cables have 24 pins arranged in 3 rows of 8. One video signal requires 12 of these pins, meaning that your typical DVI cable can carry two video signals. Complicating this is the DVI-D Single Link vs. DVI-D Dual Link.