Cisco Network Convergence System 4000 Series

Optimize Costs and Deliver Network Convergence


Bridge the gap between IP and optical layers with the Cisco Network Convergence System (NCS) 4000 Series. Converge your network with the NCS 4000 Series and its comprehensive feature set and best-in-class functionality, including support for time division multiplexing (TDM), packet switching, and integrated dense wavelength division multiplexing (DWDM).



Choose the right NCS 4000 model for you.

Features and Benefits

Converge your network

Combine packet switching, OTN switching, and coherent DWDM interfaces to optimally utilize network resources.

Architectural flexibility

Configure the NCS 4000 to fit your network’s needs, whether it be for IP transport, MPLS, LSR, and Carrier Ethernet, or migrating from legacy SONET/SDH equipment or DWDM and IPoDWDM integration or a combination of the latter.

Seamless integration and scale

Join the NCS 4000 with the Cisco NCS 6000 and NCS 2000 for massively scalable IP services and fully programmable reconfigurable optical add-drop multiplexer (ROADM) functionality.

Multilayer Management

Install, configure, monitor, and troubleshoot NCS 4000 Series applications both at the node and network levels with the Cisco Evolved Programmable Network Manager (EPN-M). Make managing your OTN and IP + Optical converged services more simple.


Solve problems faster, improve operational efficiency, and reduce your risk of downtime.


Compare models

Learn about the similarities and differences of the models within this product series.


Data Sheets and Literature

Data Sheets

End-of-Life and End-of-Sale Notices

Sales Resources

Customer reviews