When installing v7.1, configuring the ISDN system was a breeze using the "isdn-config" tool. After the upgrade, this program seems to have been replaced with "neat", which is unable to reactivate the old configuration. (I'll try to add more specifics when I have access to the machine again.)
Do you see your ISDN configuration, if you start neat ? please check in /etc/sysconfig/network-scripts/, the ifcfg-ipppX should exists. to start or stop ISDN you should use ifup or iifdown pppX (X is 0 if you only have a ISDN configuration).
Yes, I can see it (named "WorldOnline", as I named it in the old program). I'll check the availability of the scripts when I have access to the machine again. In Red Hat Linux v7.1, "service {isdn,network} start" was sufficient to start the ISDN system.
By deleting the old device from neat, neat somehow recreated it on the next startup, and I am now able to connect to the Internet using my ISDN card and kisdndock. The major problem is thus solved, but the fact still remains that it did not automatically work with the old configuration. Not a major problem, but annoying.
It's fixed in isdn4k-utils-3.1-47. You find it on ftp://people.redhat.com/than/7.2