isdn question

["Peter O. Fedichev" <Peter.Fedichev@uibk.ac.at>]

Hello

for some time we have to use ISDN connection as a permanent Internet 
connection for our server with a fixed IP address. Is there a simple way 
to configure ISDN so that it authomatically goes back online if the 
connection failed?

thanks in avance for a help

PF