* ISDN divert in a disaster recovery situation *

[Solarstone]

I have a 1600 using static routes dialling up to central site via ISDN. If that central site goes down in a disaster situation is it possible to get the 1600 to use an alternative dialer map to another site. I have looked at FSRs but I think these rely on a routing protocol in order to work, and won't switch if the default route goes down.