serial console server
|serial console server||
A serial console server (serial concentrator or console access server) is a device that provides secure, 24/7 out-of-band access to the system console of a computing device via networking technologies. A console server provides a number of serial ports, which are then connected to the serial ports of other equipment, such as servers, routers or switches. The consoles of the connected devices can then be accessed by connecting to the console server over a serial link such as a modem, or over a network with terminal emulator software such as telnet or ssh, maintaining survivable connectivity that allows remote users to log in to the various consoles without being physically nearby.