Milestone dates
The dates Cisco published, with Cisco's own wording under each milestone.
| Milestone | Date |
|---|---|
| End of saleCisco: End-of-Sale Date: HW,Accessory | |
| Last ship dateCisco: Last Ship Date: HW,Accessory | |
| End of software maintenanceCisco: End of SW Maintenance Releases Date: HW | |
| End of hardware repairCisco: End of Routine Failure Analysis Date: HW | |
| End of new service contractsCisco: End of New Service Attachment Date: HW | |
| End of security fixesCisco: End of Vulnerability/Security Support: HW | |
| End of service contract renewalCisco: End of Service Contract Renewal Date: HW | |
| Last date of supportCisco: Last Date of Support: HW |
Affected part numbers
45 part numbers are covered.
| Part number | Description | Replacement named by Cisco |
|---|---|---|
| N520-20G4Z-A | Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp | N540-6Z18G-SYS-A |
| N520-20G4Z-D | Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp | N540-6Z18G-SYS-A |
| N520-4G4Z-A | Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp | N540-6Z18G-SYS-A |
| N520-X-20G4Z-A | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | N540-6Z18G-SYS-A |
| N520-X-20G4Z-D | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | N540-6Z18G-SYS-A |
| N520-X-4G4Z-A | Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power | N540-6Z18G-SYS-A |
| N520-X-4G4Z-D | Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power | N540-6Z18G-SYS-A |
| N520-20G4Z-A= | Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp | N540-6Z18G-SYS-A |
| N520-20G4Z-D= | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | N540-6Z18G-SYS-A |
| N520-4G4Z-A= | Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp | N540-6Z18G-SYS-A |
| N520-X-20G4Z-A= | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | N540-6Z18G-SYS-A |
| N520-X-20G4Z-D= | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | N540-6Z18G-SYS-A |
| N520-X-4G4Z-A= | Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power | N540-6Z18G-SYS-A |
| N520-X-4G4Z-D= | Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power | N540-6Z18G-SYS-A |
| N520-RCKMT-19-D2A | NCS 520 19" Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D2D | NCS 520 19" Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D3A | NCS 520 19" Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D3D | NCS 520 19" Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D2A | NCS 520 23" Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D2D | NCS 520 23" Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D3A | NCS 520 23" Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D3D | NCS 520 23" Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D2A | NCS 520 ETSI Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D2D | NCS 520 ETSI Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D3A | NCS 520 ETSI Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D3D | NCS 520 ETSI Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D2A= | NCS 520 19" Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D2D= | NCS 520 19" Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D3A= | NCS 520 19" Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-19-D3D= | NCS 520 19" Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D2A= | NCS 520 23" Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D2D= | NCS 520 23" Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D3A= | NCS 520 23" Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RCKMT-23-D3D= | NCS 520 23" Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D2A= | NCS 520 ETSI Rackmount for 8 Port, AC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D2D= | NCS 520 ETSI Rackmount for 8 Port, DC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D3A= | NCS 520 ETSI Rackmount for 24 Port, AC | There is currently no replacement product available for this product. |
| N520-RMT-ETSI-D3D= | NCS 520 ETSI Rackmount for 24 Port, DC | There is currently no replacement product available for this product. |
| N520-WALLMT | NCS 520 Wall Mount | There is currently no replacement product available for this product. |
| N520-CONS-KIT-S | NCS 520 Series Serial Console Cabling Kit | There is currently no replacement product available for this product. |
| N520-CBL-BRKT | NCS 520 Cable Bracket | There is currently no replacement product available for this product. |
| N520-CBL-BRKT= | NCS 520 Cable Bracket | There is currently no replacement product available for this product. |
| N520-CONS-KIT-S= | NCS 520 Series Serial Console Cabling Kit | There is currently no replacement product available for this product. |
| N520-WALLMT= | NCS 520 Wall Mount | There is currently no replacement product available for this product. |
| N520-4G4Z-A-BUN | NCS 520 8-port, Commercial Temp, Promo Bundle | There is currently no replacement product available for this product. |
Upgrade path
Cisco names 1 replacement part number. None of them is in our catalogue yet; send the part numbers with a quote request and we will source them new.
Source
Cisco: End-of-Sale and End-of-Life Announcement for the Cisco NCS 520. Retrieved 25 October 2026. Manufacturers sometimes revise these dates; check the source for the exact part number you run.