11.3.1. OpenScape 4000 Assistant Backup & Restore on OpenScape
4000 Host System 
To support the backup and restore processes for the AP Emergency feature,
the OpenScape 4000 Assistant Backup & Restore application replicates
the software and the configuration data from the host system to the CC-APs/Survivable
OpenScape 4000 SoftGates.
It must be differentiated between HOST and APE:
- HOST
-
OpenScape 4000 Platform with the virtual machines ADP/CCA, OpenScape 4000 Assistant and OpenScape 4000 CSTA.
- APE
-
OpenScape 4000 Platform with the virtual machines CCAP, OpenScape 4000 Assistant and OpenScape 4000 CSTA.Therefore, there are four possible systems that have to be synchronized. But at the moment only CC-AP on APE is synchronized with ADP/CCA on host. This is provided by OpenScape 4000 Assistant Backup & Restore.For more information please refer to the online help of Backup & Restore.
Basic conditions regarding timing
A backup can only be carried out when the AP backup server is free,
i.e. not currently blocked by restore processes. You can set the number
of simultaneous restore processes allowed, in order to limit the load
on the server or network.
The interval between two scheduled backups must therefore be sufficient
to allow the backup and restore processes of all CC-APs in the system
to be carried out.
If the number of CC-APs is larger than the number of restore operations
supported simultaneously, some CC-APs must wait until the capacity on
the AP backup server is free before performing restore procedures. This
leads to an increase in the required restore time that must be considered
in the process as a whole.
The time required is determined by the data volume to be transported
and the available transmission bandwidth. The maximum data volume (in
the case of a system maintenance release) is estimated at 100 MB. The
average size will be less than 10% of the maximum.
If the restore process on the CC-AP/Survivable OpenScape 4000 SoftGate
requires a great deal of time (available transmission bandwidth is limited),
you must ensure that all CC-APs can be restored at the same time.
The start time for the backup also determines indirectly the content
of the database. For example, if the customer usually activates fixed
call forwarding on the telephone and if the backup is performed outside
business hours, the saved database will contain the activated call forwarding
settings. But if a problem arises during the day, which initiates emergency
mode, it will be initiated with the saved call forwarding settings.