Transition Networks SISPM1040-182D - Manual (Page 36)

Transition Networks SISPM1040-182D
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4.4 Dual Ring Application
Dual ring is an advanced function that supports backup connection to ensure redundant
transmission. If the connection fails, the system will recover from fwithin 20 milliseconds.
Apart from that, Dual Ring only needs one unit (and only the one located in the middle)
to be configured as the Ring Master switch to deploy the dual ring.