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| Part Number | Description | |
| CON-PESW-IVR4XADD | PVSO ESS SW IPIVR 4.0 Configurab | |
| CON-PESW-IVRU4040 | PVSO ESS SW IPIVR 4.0 to 4.0 ESW Maintenance Upgrade | |
| CON-PESW-IVRU4041 | PVSO ESS SW IPIVR 4.0 to 4.1 ESW Minor Upgrade | |
| CON-PESW-IVRU4045 | PVSO ESS SW IPIVR 4.0 to 4.5 ESW Minor Upgrade | |
| CON-PESW-IVRU4050 | PVSO ESS SW IPIVR 4.0 to 5.0 ESW+UCSS Major Upgrade | |
| CON-PESW-41PORT1 | PVSO ESS SW IPIVR 4.1 Port Qty 1 | |
| CON-PESW-IVR41P1 | PVSO ESS SW IPIVR 4.1 Port Qty 1 | |
| CON-PESW-IVR41UP1 | PVSO ESS SW IPIVR 4.1 Port Qty 1 SW Upg | |
| CON-PESW-IVR41P10 | PVSO ESS SW IPIVR 4.1 Port Qty 10 | |
| CON-PESW-IVR41P25 | PVSO ESS SW IPIVR 4.1 Port Qty 25 | |
| CON-PESW-IVR41P50 | PVSO ESS SW IPIVR 4.1 Port Qty 50 | |
| CON-PESW-IVRU4141 | PVSO ESS SW IPIVR 4.1 to 4.1 ESW Maintenance Upgrade | |
| CON-PESW-IVRU4150 | PVSO ESS SW IPIVR 4.1 to 5.0 ESW+UCSS Major Upgrade | |
| CON-PESW-IVR41UPG | PVSO ESS SW IPIVR 4.1 UPG | |
| CON-PESW-IVRU4545 | PVSO ESS SW IPIVR 4.5 to 4.5 ESW Maintenance Upgrade | |
| CON-PESW-IVRU4550 | PVSO ESS SW IPIVR 4.5 to 5.0 ESW+UCSS Major Upgrade | |
| CON-PESW-4XADDON | PVSO ESS SW IPIVR 4.X ADD-ON KIT | |
| CON-PESW-IVR50NEW | PVSO ESS SW IPIVR 5.0 Server ;5 Port Software | |
| CON-PESW-IVRU5050 | PVSO ESS SW IPIVR 5.0 to 5.0 ESW Maintenance Upgrade | |
| CON-PESW-IVR60AKT | PVSO ESS SW IPIVR 6.0 ADDON KIT |