Line link frames (LLFs) are tiers of 10x20 crossbar switches in two or more bays. The switches in the first bay have their horizontal multiples, or "banjo wires", cut in half, effectively dividing each switch into a line switch and a line junctor switch. Each of the ten junctor switches have ten junctors on its ten verticals, and each of its ten levels was wired as a line link, to one of the ten line switches of the LLF. Thus, the line link frame terminates 100 Junctors. Each junctor has full availability to however many hundreds of lines there are, via the hundred line links. The number of lines, thus the line concentration ratio (LCR), was engineered for the expected occupancy.