Telnet is like having a telephone connection anywhere in the world with no long distance phone company.

By entering in the name (like or number (like into the host location. Just click on the TRMPTEL icon to try it. Once connected, you can talk to anyone that is logged-in. For instance, if you are having trouble, you could Telnet to and login (assuming you have a password.) If I am logged-in, you could type:
talk help
The screen will split in