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EOL15526
Cisco announces the end-of-sale and end-of-life dates for the Cisco NCS 520. The last day to order the affected product(s) is October 28, 2025. Customers with active service contracts will continue to receive support from the Cisco Technical Assistance Center (TAC) as shown in Table 1 of the EoL bulletin. Table 1 describes the end-of-life milestones, definitions, and dates for the affected product(s). Table 2 lists the product part numbers affected by this announcement. For customers with active and paid service and support contracts, support will be available under the terms and conditions of customers' service contract.
Table 1. End-of-life milestones and dates for the Cisco NCS 520
| Milestone |
Definition |
Date |
| End-of-Life Announcement Date |
The date the document that announces the end-of-sale and end-of-life of a product is distributed to the general public. |
October 28, 2024 |
| End-of-Sale Date: |
The last date to order the product through Cisco point-of-sale mechanisms. The product is no longer for sale after this date. |
October 28, 2025 |
| Last Ship Date: |
The last-possible ship date that can be requested of Cisco and/or its contract manufacturers. Actual ship date is dependent on lead time. |
January 27, 2026 |
| End of SW Maintenance Releases Date: |
The last date that Cisco Engineering may release any final software maintenance releases or bug fixes. After this date, Cisco Engineering will no longer develop, repair, maintain, or test the product software. |
March 30, 2026 |
| End of Vulnerability/Security Support: |
The last date that Cisco Engineering may release a planned maintenance release or scheduled software remedy for a security vulnerability issue. |
September 30, 2027 |
| End of Routine Failure Analysis Date: |
The last-possible date a routine failure analysis may be performed to determine the cause of hardware product failure or defect. |
October 28, 2026 |
| End of New Service Attachment Date: |
For equipment and software that is not covered by a service-and-support contract, this is the last date to order a new service-and-support contract or add the equipment and/or software to an existing service-and-support contract. |
October 28, 2026 |
| End of Service Contract Renewal Date: |
The last date to extend or renew a service contract for the product. |
January 26, 2030 |
| Last Date of Support: |
The last date to receive applicable service and support for the product as entitled by active service contracts or by warranty terms and conditions. After this date, all support services for the product are unavailable, and the product becomes obsolete. |
October 31, 2030 |
Table 2. Product Part Numbers Affected by This Announcement
| End-of-Sale Product Part Number |
Product Description |
Replacement Product Part Number |
Replacement Product Description |
Additional Information |
| N520-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-20G4Z-A |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-20G4Z-D |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-4G4Z-A |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-4G4Z-D |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-4G4Z-D |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-4G4Z-D |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-20G4Z-A= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-20G4Z-D= |
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-4G4Z-A= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, AC power |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| N520-X-4G4Z-D= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ AC |
- |
| N520-X-4G4Z-D= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540X-6Z18G-SYS-A |
NCS540 18x1G SFP + 6x1/10G SFP+ Dual-AC iTEMP Conformal Coat |
- |
| N520-X-4G4Z-D= |
Cisco NCS 520 - 4xGE + 4x10GE, Industrial Temp, DC power |
N540X-8Z16G-SYS-A |
N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
- |
| 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. |
- |
- |
Customers may be able to use the Cisco Technology Migration Program (TMP) where applicable to trade-in eligible products and receive credit toward the purchase of new Cisco equipment. For more information about Cisco TMP, customers should work with their Cisco Partner or Cisco account team. Cisco Partners can find additional TMP information on Partner Central at https://www.cisco.com/web/partners/incentives_and_promotions/tmp.html.
Customers may be able to continue to purchase the Cisco NCS 520 through the Cisco Certified Refurbished Equipment program. Refurbished units may be available in limited supply for sale in certain countries on a first-come, first-served basis until the Last Date of Support has been reached. For information about the Cisco Certified Refurbished Equipment program, go to: https://www.cisco.com/go/eos.
The Cisco Takeback and Recycle program helps businesses properly dispose of surplus products that have reached their end of useful life. The program is open to all business users of Cisco equipment and its associated brands and subsidiaries. For more information, go to: https://www.cisco.com/web/about/ac227/ac228/ac231/about_cisco_takeback_recycling.html.
For more information about the Cisco End-of-Life Policy, go to:
https://www.cisco.com/en/US/products/products_end-of-life_policy.html
For more information about the Cisco Product Warranties, go to:
https://www.cisco.com/en/US/products/prod_warranties_listing.html
To subscribe to receive end-of-life/end-of-sale information, go to:
https://www.cisco.com/cisco/support/notifications.html
Any authorized translation issued by Cisco Systems or affiliates of this end-of-life Product Bulletin is intended to help customers understand the content described in the English version. This translation is the result of a commercially reasonable effort; however, if there are discrepancies between the English version and the translated document, please refer to the English version, which is considered authoritative.