I assume you're trying to establish a method of connecting back into your network from the outside. AbsoluteTelnet cannot help you unless you are able to determine the IP address in some way.
I use no-ip at home myself. However, I use it with the Linux client, so the prodecure for setup on Windows may be a little different. You must install and configure the no-ip client software at home so that if your dynamic IP address changes, the IP address can be re-broadcast to the outside world. You can then reference your IP address as something like 'myaddress.noip.com' or however you set it up at noip.com. Care must be taken, though, that the noip client picks up your external internet address and not the internal address of your PC, which may be different.
Once into the network, you could use AbsoluteTelnet and SSH port forwarding to access various other machines on your network, but that would require setting up an SSH server (AbsoluteTelnet is SSH client software only). Most Linux distributions come with SSH server software built in. Some add-on software can be purchased for Windows (
www.bitvise.com).
Does this help?