I was asked to add a US number in the phone directory.
e.g. 0016038324567 (the number is modified but is a valid number).
The system says it is an unknown number. I played with it for a while, the pattern seems to be that the system does not like numbers begin with 001. (00 is fine, because we have 0048********* in the directory).
I cannot find a rule saying 001****** is not allowed. Does anyone know where the problem lies? Many thx.