3.2.6.1 Transaction Timeout Timer
When the Transaction Timeout timer expires, the core transaction manager MUST perform the following actions:
If the provided transaction object is in one of the following states, the core transaction manager MUST ignore the timer event:
Otherwise, the core transaction manager MUST:
Signal the Unilaterally Aborted event on the transaction's superior enlistment's transaction manager facet with the Superior Enlistment object of the transaction.
Signal the Notify Aborted event on the Core Transaction Manager Facet using the provided transaction object.