- When I pickup a deskphone and dial an extension, I get "invalid number"
- I also get "invalid number" when I dial the company number and enter the extension
- Login to PISTON as the admin user.
- Verify there is a user and device for the extension number in question.
- Verify there is also a callflow for the extension number.
- If one of the three (user, device or callflow) is missing, then create the necessary missing one.