Cisco NIM-24A 24-Port Analog Voice Network Interface Module

Asynchronous Terminal Server Interface Modules for Cisco 4000 Series Integrated Services Routers.

Asynchronous interface modules provide high-density terminal server functionality to Cisco® 4000 Series Integrated Services Routers (ISRs). Up to 200 terminal server connections can be supported on a single platform- eight more than are supported on the Cisco ISR G2.