We are having terrible problems in a new office with certain outgoing and incoming calls having extremely low volume, so low that you can only catch maybe one of every three words the other party says. The phone system we use worked fine at a previous office, so we suspect that this is a phone line issue and not in the phone system hardware. Various tests suggest that the problem is not with internal wiring, but probably with one or more of the outgoing trunk lines. We have four separate trunks that any incoming or outgoing call may go through. We had the phone company come out and test the lines, but they insist they are good.
How can I measure line quality in an objective way? I would want to measure voltage or some concept that would give me a good objective measurement of how strong and how clear the signal is at the point our phone system connects to the trunk. If I could do the measurements directly to the trunk lines then we could isolate exactly which ones are causing the problem.
Another question is who do you call for such a problem? Our techs who do internal wiring don't seem to be electrically minded, and simply don't have equipment that can do good line quality measurements. The company that sold the phone system can barely do Windows administration and simple phone system installation tasks. They simply aren't technical enough to solve this problem at the low level I think it needs to be debugged.
Any advice on how to proceed here is appreciated. I live on the phone at work and it's killing us.