Alcatel-Lucent 1643 AMS User's Operation Manual page 666

Software upgrade
Commit the software
After confirmation of a switch command between the active and backup store, the
management system loses its association with the network element. If the management
system can renew the association with the network element the active store is
committed. If the active store is not committed within two hours after the switch, the
network element will switch back to the old software load.
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12-4 Alcatel-Lucent - Proprietary
See notice on first page
Software upgrade
365-312-807R7.2
Issue 4, May 2007