How can I telnet to a cisco router from Ubuntu 8.04 (hardy)?

How can I telnet to a cisco router from Ubuntu 8.04 (hardy)?
I am not very experienced with Ubuntu (and Linux) and would like to connect to an old Cisco router from a Dell Mini I just received running Ubuntu.

Is there a simple way to do this?
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after you login to your system, from command line run

telnet ipaddressofrouter
CardPullerAuthor Commented:
Thanks, but one more stupid question  . . . how do I get to a command line in Ubuntu?
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CardPullerAuthor Commented:
Ok, thanks again, but it says:  telnet: command not found

/usr/bin/telnet ipaddress
then do :

sudo aptitude install telnet

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CardPullerAuthor Commented:
OK, Chesha's comment got the telnet running, but now I get a "Unable to connect to remote host:  Connection timed out" message on both of the Cisco routers I am trying to connect to.
Both routers are up and I can connect right now from a Windows XP telnet.
This laptop is online (I can surf and hit terminal services connections, etc.) Anything I need to tweak for the telnet to work?
Problem with iptables perhaps?  Can you post the output for:   sudo iptables -L -v
CardPullerAuthor Commented:
Thank you takendown, but the final issue appeared to be the wireless modem/router I was connected to at the time.  Everything else worked, except the telnet. When I finally returned home the telnet worked fine from here.  
CardPullerAuthor Commented:
Thank you all for your help with this.  It was a bad day and when I started to Google this, I was getting a lot of higher end solutions.  All I needed was telnet for a quick connect every now and then.  You are all true namesakes for this site.  I really needed someone on my side yesterday and you came through.  Thanks.
Welcome at any time :)
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