Broadview's monitoring service requires connection to landline phone service. Since moving to this house we have tried Time Warner Cable and AT&T landline phone service, and in both cases the phone line repeatedly went dead for extended periods of time, with NO WARNING FROM BROADVIEW. In other words, Broadview's system failed to notify us that our house was not being monitored! Due to the phone line problems we were forced to switch to Vonage. Once informed that Broadview is not compatible with Vonage, we switched alarm companie... read full review »