On Wed, 01/22/2014 05:46 PM, Jay Hennigan wrote: > > Can you originate a call to that number from a different carrier via > > PRI, and see which ISDN error you get back? Or have someone else call > > it that way? > > > > ISDN errors tend to have a bit more data in them. > > > > I'd do it, but I don't have any PRIs laying around anymore. > > I do. What's the TN or at least the block? > > I've got SS7 ISUP trunks I can test with too, if you want to send the number (or a test number with the same problem) privately.