If you use the Optional Upgrade Sequence feature, your core Communication Manager and Survivable Remote Servers (LSP) might not run on the same software version. You can check the software version of each Survivable Remote Server (LSP) in your network and upgrade them to the same or a later software version than your core Communication Manager. To view the software version, log in to the core Communication Manager through SAT and run the list survivable-processor command. The list displays all the Survivable Remote Servers (LSP) and their current software version.

To read the software version numbers displayed on the SAT screen, refer to the Software version field description topic in Administering Avaya Aura® Communication Manager.