The active Equipment Controller is unable to synchronize its database with the inactive Equipment Controller. [CAUSE] The tmnxOesDbSyncFailure notification may be raised under the following conditions: 1) An incorrectly seated Equipment Controller; 2) The software versions on the active and inactive Equipment Controllers are not compatible; 3) A hardware problem with one or both controllers. [EFFECT] The OES does not have redundancy protection between the two Equipment Controller cards. [RECOVERY] Proceed as follows to clear the Database Synchronization Failed alarm: 1) Remove the Equipment Controller with the condition and examine the connector on the back of the card for damage, including bent or broken pins; 2) Examine the connector on the backplane for damage. If there is damage to the backplane of the shelf, contact your service representative; 3) Re-insert the Equipment Controller into its original slot and allow the card to initialize; 4) Repeat Step 2) through Step 4) for the second Equipment Controller; 5) Replace the Equipment Controller with the alarm condition with a new unit. If the condition is not cleared, replace the second Equipment Controller with a new unit. Follow the return and repair process to return the faulty card to an authorized repair center for replacement.