I'd try it with a non-cordless phone. If that's OK, it's an issue with your phone. If it does the same, it's their problem.
Hi, I'm looking for a good place to get information on landline cordless phone troubleshooting.
We are hearing voices from other people on our cordless landline phone as well as ghost calls that ring strangely but don't connect. The phone company claims this is our problem because of nearby phones. But we've had problems in the past with a line issue that was always bad when it rained that they fixed eventually, but may be failing again. And since we are rural, there are not a lot of chances for actual interference; only one house is closer than 2000 feet and the voices are not theirs.
Anyway, I couldn't find any technical forums to discuss this in my first round of web searching. Any technical discussion would be appreciated.