TTY lines on a router

[Pramod.purohit]

What are the tty lines on a router and what is the use of tty lines?

[Big Evil]

To have a TTY line on your router, you must have an ASYNC card in your router. This card provides some number of asynchronous serial ports on the router, which you can use for serial printers, serial modems, or dumb ASCII text terminals. With those ports, the serial printers could become networked printers (using the LPD service on the router), and the dumb terminals could become networked Telnet devices.

HTH.