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| Part Number | Description | |
| CON-ESW-IVR41A | ESSENTIAL SW IPIVR 4.0 Configurable-ADD to EXISTING | |
| CON-ESW-IVR4PT10 | Essential SW IPIVR 4.0 Port Qty 1 | |
| CON-ESW-IVR4PT25 | Essential SW IPIVR 4.0 Port Qty 2 | |
| CON-ESW-IVR4PT50 | Essential SW IPIVR 4.0 Port Qty 5 | |
| CON-ESW-IVR4PT1 | Essential SW IPIVR 4.0 Port Qty1 | |
| CON-ESW-IVRU4040 | ESSENTIAL SW IPIVR 4.0 to 4.0 ESW Maintenance Upgrade | |
| CON-ESW-IVRU4041 | ESSENTIAL SW IPIVR 4.0 to 4.1 ESW Minor Upgrade | |
| CON-ESW-IVRU4045 | ESSENTIAL SW IPIVR 4.0 to 4.5 ESW Minor Upgrade | |
| CON-ESW-IVRU4050 | ESSENTIAL SW IPIVR 4.0 to 5.0 ESW+UCSS Major Upgrade | |
| CON-ESW-41PORT1 | ESSENTIAL SW IPIVR 4.1 Port Qty 1 | |
| CON-ESW-IVR41P1 | ESSENTIAL SW IPIVR 4.1 Port Qty 1 | |
| CON-ESW-IVR41UP1 | ESSENTIAL SW IPIVR 4.1 Port Qty 1 SW Upg | |
| CON-ESW-IVR41P10 | ESSENTIAL SW IPIVR 4.1 Port Qty 10 | |
| CON-ESW-IVR41P25 | ESSENTIAL SW IPIVR 4.1 Port Qty 25 | |
| CON-ESW-IVR41P50 | ESSENTIAL SW IPIVR 4.1 Port Qty 50 | |
| CON-ESW-IVRU4141 | ESSENTIAL SW IPIVR 4.1 to 4.1 ESW Maintenance Upgrade | |
| CON-ESW-IVRU4150 | ESSENTIAL SW IPIVR 4.1 to 5.0 ESW+UCSS Major Upgrade | |
| CON-ESW-IVR41UPG | ESSENTIAL SW IPIVR 4.1 UPG | |
| CON-ESW-IVR45-1A | ESSENTIAL SW IPIVR 4.5 7815 Svr SW OS 5 Port | |
| CON-ESW-IVR45-IC | ESSENTIAL SW IPIVR 4.5 7845 Svr SW OS 5 Port |