Hi,
Having some trouble with a carrier on number delivery for a PRI. The customer switched carriers, and formerly the number delivery was working correctly to AT&T cell phones. Now however the display just shows "unknown" when receiving a call from the customer. The new carrier says that AT&T requires four fields to be correct when calls go out; Nature of address, number plan, address presentation, and screening indicator. I have not seen any of these fields on an ICP. However, the carrier is using an Adtran on site to provide the PRI. Should these settings be found in there?
Thanks!