it's not the easiest job for a 'neophite', but it can be done. Initially, you would set "floating default router" for the T1 connections. That is, you configure like
"ip route 0.0.0.0 0.0.0.0 int serial X/Y 200".
200 is what makes the route to be "floating", that is it will get in effect only when a the default route without such a number, goes away.
The problem with this approach is that you can have cases in which the fiber interface is up, but no actual internet connectivity. To solve this, you need a more advance config called "object tracking" or sometime "IP SLA". It also require policy based routing for reasons that would become clear once getting into the details of such advanced config.
However I suggest you try out first the above before going for the more advanced.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.