... Silence SuppressionAttenuation / Gain AdjustmentsFlash Hook TimerMWI - Message Waiting Indicator TonesVMWI - Visual Message Waiting Indicator via FSKPolarity ControlHook Flash Event SignalingCaller ID Generation ... FXS Phone Ports - For Analog Circuit Telephone Device (Tip/Ring)Indicator Lights/LED:Phone1, Phone2, Internet, Power PAP2T