How to login to a machine using telnet

[harisiam]

Hi,

I need to login to a device using telnet. i need to give some username and password and run some commands. how do I do this from a Linux machine using ssh.

[crossrulz]

SSH and Telnet are completely different network communication protocols.  They do not intermix.

For most Telnet devices I have ran into, you can just use the standard TCP functions to write and read ASCII data.  It only gets weird if command codes get involved.