ONT is the "optical network terminal", commonly known as the light cat, which is usually placed in the living room or study room to provide Internet, video, voice and other services for home users.

When the V3 storage uses DC power, connect the OT terminal of the black cable to the RTN (+) terminal and the OT terminal of the blue cable to the NEG (-) terminal.

The CH220/CH221 compute node performs IO expansion on the basis of the CH121 compute node and supports up to four PCIe cards in the full-width slot.