Comment # 4 on bug 875730 from Robert Milasan

(In reply to Reinhard Max from comment #3)
> SLE12 already ships without ISDN support and the reason why it is still in
> openSUSE is probably just because nobody bothered taking it out yet. No, you
> won't have to throw away your telephony hardware if you still have a
> provider that gives you ISDN, but the days of those are also counted, AFAIK.
> 
> And if it is a general problem about udev we should pass it on to the udev
> maintainers.

Are you serious? Once you tell the reported that this is not supported and it's
not worth your time and if that doesn't work, you throw it to udev/system
maintainer?

Isn't it clear what Dmitri wrote you, just fix isdn.sh? What is wrong with you?
If SLE12 doesn't ship ISDN support, doesn't mean openSUSE wont. There wont be
customer using ISDN on SLE12, but normal users will on openSUSE.