[CAUSE] The tmnxOesDbUnsync notification is generated when the active and standby Equipment Controllers are not in sync. [EFFECT] The OES does not have redundancy protection between the two Equipment Controller cards. If a switchover were to occur, then the database of the newly active controller might not reflect the latest configuration. [RECOVERY] Proceed as follows to clear the Database Unsynchronization alarm: 1) Perform a warm reset of the standby controller; 2) If step 1 does not clear the alarm condition, then contact the next level of technical support for help.