IMHO unless he's right on top the CO or feed by carrier that's misaligned levels are not going to be an issue. I'd bet loop current isn't the issue either. I'm sticking with the problem lies with-in the IP system. Of course we won't know any of this for sure until we see the test results.
How can these IP developed systems all at once say the established requirements don't apply to us? At least that's the way I'm reading what mgere is telling us that he's being told by the IP systems tech support.
