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21AT-IFS802SP-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gureisasampleofcouplingringapplication.Thecoupleringconsists

of four switches—switch 1 ~ switch 4—which are connected to each other via the paths in red. Please

note that the Coupling Ring Backup Path between switch 1 and switch 3 is blocked; it will work

only when the path between switch 2 and switch 4 is broken or disconnected.

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Allied-telesis AT-IFS802SP Manuale Utente Pagina 25