Working mode of cross-connect boards in hot backup in an OSN 8800 T64 subrack

Two USXH boards are configured for each OSN 8800 T64 subrack, one on the front side and one on the rear side. UXCT boards are configured in the same way. The USXH (UXCT) boards on the front and rear sides are in 1+1 hot backup mode.

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