asterisk users - Jun 2005 - AGI to monitor conenction quality

I need an AGI to monitor the quality of two connections and return a 
yes/no based on packet loss, connectivy, provider being there, so I can 
rollover the dial plan and dial the next available method. We have two 
internet connections, two providers, and PSTN for backup.

My main concern is to make sure the call gets connected one way or the 
other, cost being secondary but also important. I am not looking to 
determine the quality of the VOIP provider, just the network.
Has anyone got some code?

-- 
Chris Mason
NetConcepts
(264) 497-5670 Fax: (264) 497-8463
Int:  (305) 704-7249 Fax: (815)301-9759 
Cell: 264-235-5670
Yahoo IM: netconcepts_anguilla@yahoo.com