I am working with trunking a freepbx to a genband c15 switch at a PSTN. Incoming calls fail due to added information in the incoming uri information. This information is in regards to the C15 switch tagging the call that a number portability check has been performed. Below is an error message showing an example of how the inbound number called is getting set up:
"Received an unknown call with DID set to 5559900;npdi=yes") in new stack
;npdi=yes is causing the inbound number to not be recognized.
Has anyone else run into this issue?