asterisk users - Jun 2012 - fritzbox

Hi,

Couple of moments ago my asteriskbox with a bri-card went down.
(burn-out)

I've heard that it seems to be possible to use an fritz!box as an
isdn-gateway (isdn <--> sip)

Anyone around who has good/bad experiences with those AVM-boxes?

(yeah, i know it is tech overkill, but i'll get an dualband wifi router,
that is Ipv6-ready with it)

Hans.