Since it is a PRi, have the provider climb on the circuit and see what is going out.
The tech at the switch can see digits, translations, etc.
We had a Samsung 500 that would not accept DIDs with a leading digit zero and the people had those numbers for years. The switch "translated" the dialed 0050 and sent the digits 1050 to the Samsung which worked fine.
If they can translate outgoing digits they should be able to translate incoming digits and make you crazy thinking 411 is 911. Easily could be a glitch in the switch, not the Norstar.
