Few years ago I used those commands everyday at work, so I might be able to help to you out. Check out this website http://www.dialogic.com/support/helpweb/lasat/manuals/saf/Command/atlist.htm
You have to code those commands into your hardware, also you have to decide which telnet you want to use, you can download PuTTY or if you have Hyperterminal already on your system. Any further questions you can ask via rayphil02@yahoo.com, I will be happy to assist if I can.