Very high pitched continuous tone for incoming and outgoing calls, once they connect, Callers say they hear me but I only hear the tone. Phone worked fine all afternoon and now calls connect but can't hear any other noises even in background. Connections not been touched or interferred with. Broadband is working fine, all lights on router are green. Any ideas besides the hints listed on website and already tried, please? Hate to have engineer come out and have to pay out my Xmas budget!! Thanks for reading 🙂
