Nortel 2000, Using Manual

Page: 95 / 405

Chapter 2 Network configuration 95
Using the Business Policy Switch 2000 Version 1.2
Unit Select switch
The Unit Select switch (up = Base) determines the base unit for the stack
configuration (see
“Base unit ”). The Unit Select switch status is displayed on the
Business Policy Switch LED display panel. When the Unit Select switch is in the
Base (up) position, all other Unit Select switches in the stack configuration must
be set to Off (down).
Cascade A In connector
Provides an attachment point for accepting a cascade cable connection from an
adjacent unit in the stack. A return cable from this unit’s Cascade A Out connector
to the adjacent unit’s Cascade A In connector completes the stack connection (see
the example shown in
Figure 13 ).
Figure 13 Connecting cascade cables
1 Base unit
2 303978-A cascade cable
3 303978-A cascade cable (used for return)
9812EA
3 2
1
Cascade A Out
Unit 1
Unit 2
Cascade A In