Allied Telesis AT-MCF2300 - Manual (Page 62)

Chapter 4: AT-MCF2000M Management Module
62 Section I: Features
Stack Port
You use the Stack port to connect the chassis to another chassis that has
the AT-MCF2000S Stacking Module so that you can manage the units
simultaneously. For background information, refer to Chapter 5,
“AT-MCF2000S Stacking Module” on page 73.