When I try to upgrade from 3.3.1 to 4.1.0, the unit reverts to the old version.

1. The unit reverts to the old version even though I loaded a new

Log on to the GUI and press the SIP button. Go to the SIP Registrar page and make sure that the Maximum number of users field is empty or has a value which doesn't exceed the number of installed SIP licenses on the unit. Go to the Save/Load Configuration page under Administration and apply the new setting.

2. The unit reverts even though I did the change above

There can be more settings that become invalid in the new version. 4.1.0 comes with a whole set of new error checks, which means that your valid 3.3.1 configuration can be an invalid 4.1.0 configuration.

This is how to get around it: Make a backup of your configuration and load the Factory configuration. Set an IP address and a configuration address for your firewall/SIParator, apply the new configuration and upgrade to 4.1.0. When the upgrade is made, you can load the backup configuration again, and correct the invalid settings.

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