If you have a FON router this hack will give you access to the serial console.
“Out of the box the foneros wireless router has Telnet and SSH turned off. By accessing the buit in serial console you can turn SSH on and access various settings and reflash the firmware.”
Via: Gizmodo
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Excellent! I ordered one of these, and did not have a use for it. Now it seems I do!
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The original article is located here:
http://sodoityourself.com/accessing-serial-console-on-the-fon
I think you should refer to it instead of a copy.