A little background. Three years ago the company I work for pre-wired a rather large warehouse off of US 30 just outside of Columbia City, near Fort Wayne in Indiana. The bill fit among 30 some odd Comdial phones and 30 some paging horns. A few weeks ago the company tried to separate the paging horns into a North and south designation for whatever reason. After trying for a week to get it to work, they decided they were going to hold off on it. So we went back and put everything back the way it was. Now comes the problem. The back 6 horns do not work. Me and my partner Sam spent all day friday trying to get them to work with no avail. Here is how the building is set up. Main phone room. Two Valcom paging units control the whole setup. The paging ports from the system come from the Violet/brown pair, and the 24v power comes from the Violet/slate pair. These go through three different mezzanines. We traced the paging ability through Mezz. 1, 2 and 3. All three mezzanine blocks have the optimum power and ability to page as tested from the cordless and our test set where we HEARD the pages. Yet the back 6 speakers still will not work. We replaced everything except the horns and wiring going to them in a failed effort to get them to ring. The horns all have the volume turned up and they're all getting power to them. What could the problem be?