I have DSL in a remote cabin, 4mb download speed. The ISP has found several problems and corrected them, and now said they show "no errors" when a tech comes out. Symptoms as follows: 1) During WiFi phone calls the call will sometimes drop about every 3-10 minutes. 2) Using VoiP, the same thing happens. I downloaded a 'Ping Monitor' app and notice ~100ms returns. However sometimes I will get a single 'red' spike ~ 2500ms; or when the calls drop there are a group of 2500ms red spikes lasting about 20 seconds. I remote work and these drops coincide with getting kicked off my company VPN. During a red spike episode I can't make an outgoing call, either. Non-VPN websites will hang during these outages. Their modem has been replaced and the ISP says everything is fine. Is it? What do these 2500 ms pings mean? This was not always happening. This problem has been going on for ~4 months. A neighbor reports the same problem. Help me, please.