This object depends on the csfRecordCrankBackTransitType
object. When that object value is 'blockedNode',
csfRecordCrankBackNodeId indicates the node ID of
the blocked node. When the csfRecordCrankBackTransitType
object value is 'blockedLink', this object indicates the
node ID of the logical node preceding the link at which
the call/connection was blocked. When the
csfRecordCrankBackTransitType object value is
'blockedIncomingPort' or 'noCrankBack', this object is
set to null.