Is it possible that some enhanced 911 #'s have an ss7 field for dnis or something along those lines that forwards the 'backdoor' to an intercept like this when it is dialed directly? If that was the case, a recording like this would make sense.
Does 911 require a 'real' phone number (and so therefore all 911 centers have a backdoor)? I thought I remembered reading this somewhere but I don't know the mechanics behind it.
Hmm... I would think so. I remember one time we called 911 to report an accident or something (was a long time ago, can't remember the exact reason) but we were just far enough out that they were like 'here, call this number instead, its the 911 district nearest to your location, they'll handle it' Gave us a 10-digit number that was a direct line to a 911 in the other area.