Cisco NIM-16A Async Serial Interface Expansion Module

The Cisco NIM-16A Async Serial Interface Expansion Module adds 16 asynchronous serial ports to Cisco ISR 4000 Series routers, enabling expanded console connectivity and serial device communication. It supports four-channel async serial interface groups and uses high-density serial interface connectors, designed for NIM slot installation in enterprise branch offices, service provider networks, and remote management environments. As an internal router expansion module, it expands interface capabilities for management and control of legacy equipment and other serial devices, with compatibility across Cisco Integrated Services Routers 4000 Series. Common replacements include Cisco NIM-8A Asynchronous Serial Interface Module, Cisco NIM-4A Asynchronous Serial Interface Module, and Cisco HWIC-16A Asynchronous Serial Interface Card.