It is possible to bridge 2 routers over a T1 but usually it is not recommended.
The most simple approach to doing this is to turn off IP routing on both routers, configure a bridge group, and assign the bridge group to both the LAN interface and the serial interface. This very effectively bridges both routers together over the T1. One of the main reasons this is usually not recommended is that now all broadcasts from one LAN are bridged over the T1 to the other LAN.
If you do not want to turn off IP routing then the alternative to consider is to configure IRB on each router. Integrated Routing and Bridging configured a virtual interface (BVI) which gets an IP address and participates in IP routing and a bridge group which is assigned to both the serial and the LAN interface.
I agree with Daniel that if we knew more about your environment and your requirements that we might be able to identify some other solution that might achieve what you are trying to do.
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.