Is there any software available (preferably freeware) that allows you to test the frequency responses on a phone line?
There is a constant audible hiss / high pitched noise on my phone line and my telecom provider has utterly failed to fix it. There are no competing telecos in the area, so I can't switch provider. My teleco isn't contractually obliged to provide a line fit for data above 9600 baud unless I pay a VERY large sum of money for a digital line. Anyone got any thoughts?