Allied Telesis AT-IFS802SP/POE - Manual (Page 25)

21 AT-IFS802SP/POE(W)-80 User Manual
4.2 Coupling Ring Application
In the network, it may have more than one X-Ring group. By using the coupling ring function, it can
connect each X-Ring for the redundant backup. It can ensure the transmissions between two ring
groups not to fail. The following figure is a sample of coupling ring application.