Avaya 5000 Series Installing page 19

The stack connector is a component of the Ethernet Routing Switch 5000 Series back panel
and consists of the Unit Select switch, Cascade Down connector, and Cascade Up
connector.
The Cascade Down connector connects this switch to the next unit in the stack through a
cascade cable. A connection from this connector must be attached to the Cascade Up
connector of the next switch in the stack. A return cable from another Cascade Down connector
to this unit's Cascade Up connector completes the stack connection.
Important:
To create a stack connection, order the appropriate Ethernet Routing Switch 5000 Series
cascade cables to ensure fail-safe stacking. An 18 inch cable is provided with the switch.
Ensure you order additional stacking cables of the correct length for a stack of three or more
units -- you require one long cable (stack return cable) to complete the loop in a stack from
the bottom unit to the top unit. See
page 22.
The Cascade Up connector provides an attachment point for accepting a cascade cable
connection from another unit in the stack. A return cable from the Cascade Down connector
to the Cascade Up connector on the adjacent unit completes the stack connection.
Figure 2: Stack connector for a 5600 Series switch
Understanding stack types
This section describes the different stack types.
Due to stack parameters being associated with the base unit, the physical stack order depends
on the base unit position and whether the stack is configured cascade up (stack up) or cascade
down (stack down). This designation depends on the stack cabling arrangement.
The Unit Select switch is used to designate a switch in the stack as a base or non-base unit.
Sliding the switch to the right designates that switch as the base unit. Only one switch in a
stack may have the Unit Select switch in the base unit position. All other switches in the stack
must have the Unit Select switch in the left position which designates them as non-base
units.
During the initial installation of the stack, the software automatically determines the physical
order of all units in the stack according to the position of the base unit within the stack.
Installing Avaya Ethernet Routing Switch 5000 Series
Cascade down on page 20 and
Placement options and cables
Cascade up on
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