I was trying to install an analog phone on a BCM50e with no expansion mods. Just the one amphenol. I am under the impression that the analog ports follow the 4 CO lines and would start with the slate pair. In Element Manager it shows that the system has 4 CO ports/12 digital sta/4 analog ports. It shows those as ACTIVE in the Keycodes section. But I cannot get the analog phone to work or get analog dial tone from any of the pairs that are not in use, tried them all. What am I missing?