Avaya 3500 Series Installing page 26

Stack configurations
Figure 6: Cascade Down (Stack Down) 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.)
Important:
Because many network management software packages assume a cascade down (stack
down) configuration, Avaya recommends that you use a cascade down configuration.
Cascade up
In a cascade up (stack up) configuration, the base unit is physically the bottom unit in the stack.
The cable connected to the Cascade Down connector of the base unit terminates in the
26 February 2013