I am getting ready for my carrier to install a new PRI and they are asking how many digits we receive 4, 7, or 10. I think it's 7 and the installers suspect it's 7, but I don't know how to verify. I've gone through all of the settings in 3CX and our Patton SmartNode, but I don't really know what I'm looking for. Can anyone point me in the right direction? There's got to be some test I can do or logs I can look at that will tell me how many digits we are receiving from the carrier.