does anyone know if there is a restriction on the used encryption for cisco VPN clients in the UK?if I use an analog line everything works fine and a VPN connection is no problemif I try the same with a broadband line I cannot connect to our PIXthnx

I am looking for a way to use two Cisco 1600 series routers with WAN ISDN cards as one dual ethernet router by connecting the two on their serial ports with a null modem cableis this possible and will it work with a reasonable speed ?thnx,