Comment: I have an older ATT system in the home, some of whose ports have previously failed. Recently, another extension failed - tests show that the instrument and patch cord are functional, suggesting either a port failure or a break in a cable
Comment: We have phone service through Optimum Voice. We make use of original jack so we have service throughout house. Whnever it rains we lose service. Cablevision will not service problem on outside of house.