[Asterisk-bsd] Asterisk PBX on SGI Indy?

[Marianne Spiller]

Hi folks,          
                   
anyone ever tried to set up an Asterisk PBX on a SGI Indy?
The onboard chip should be able to get switched into NT mode,
however, it isn't HFC IIRC.
                   
I just installed the software via pkgsrc (NetBSD), and it
runs fine; I also can connect via phone software, but a
setup with 'real' phones gets no dial tone (but works fine on
a PC with HFC card).
                   
Now I'm a little confused, and the docs are predominantly bad.
Has anyone further information about the Indy's ISDN?

Greets,
  Marianne