Siemens has issued an ufsn 33114 on july 2015 to notify affected customers regarding dual port issue and asked them to stop using the dual port feature.As per ufsn, section 'actions to be taken by the customer'; "determine if your system is configured to use dual port lis transmission.If the system is currently set up with dual lis transmission enabled, one of the ports (either serial or ethernet) needs to be disabled." customer was informed of the ufsn by a siemens customer service engineer (cse), however, the customer continued to use the dual port future by their responsibility.The event has occurred due to an operator error.
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