Avaya 3500 Series Installing page 27

Cascade Up connector physically at the bottom of the stack. The next unit is designated unit
2. The stack is wired upward through the units and the system continues to number in this
manner throughout the stack. In this configuration, the base unit discovers the stack in a
cascade up (stack up) direction. The following illustration demonstrates a typical cascade up
(stack up) configuration.
Figure 7: Cascade Up (Stack Up ) configuration
1. Base Unit
2. Last Unit
3. Cascade/Stack Cable
4. Cascade/Stack Cable (Return cable to make stack resilient. Use longer stack cable
if required.)
Stack configurations
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