ZCOM Message Handling
ZLU Definition
Mapped ZLUs
All messages addressed to a particular ZLU will be redirected to the alternate ZLU specified in the zmapr routine call if the original ZLU has been mapped to a different ZLU. One use of mapped ZLUs is for providing high availability systems. For example, if a hardware failure was detected in one of the ACC Mux cards, the application could map all of the ZLUs associated with the failed card to a spare unused card in the system.
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