Cisco NM-4A/S enterprise networking (router/Catalyst switch/UCS families) Router Line Card

The Cisco NM-4A/S is a 4-port asynchronous/synchronous serial network module for Cisco’s modular access router platforms, including the 2600 and 3600 series. It is the lower-density sibling of the NM-8A/S, with each of its four ports independently configurable for synchronous serial WAN use (leased lines, Frame Relay, etc.) or asynchronous use (modem/console connections), suiting smaller branch or lab deployments that don’t need eight ports of serial capacity. It fits the router’s network-module slot alongside other WAN, voice and Ethernet modules. This remains a routine spare for existing deployments using this module, restoring capacity or replacing a failed unit. Confirm your target router platform and available network-module slot before ordering. This is a refurbished unit, shipped worldwide from Tech-Star’s UK stock.