Cisco SM-X-64A
Cisco SM-X-64A 64-Port Async Serial SM Module for Cisco ISR 4331, 4351, 4451
The Cisco SM-X-64A is an asynchronous terminal server interface module that provides 64 RS-232 connections for Cisco Integrated Services Routers, enabling high-density terminal server functionality. It allows for out-of-band management of console ports, giving network operators centralized access to remote devices.