OK, the way it works is; the US phone system will not allow the silent answer feature to work right. Therefor, the feature was eleminated from the US model. I am using a UK model now with the feature. I just had to change the power supply brick to a US 110 volt model. The answer machine now answers after one ring as opposed to after the third ring (minimum) with the US model. The US phone system begins an incoming call signal with a ring. Outside the US, a call signal does not start with a ring, allowing the answer machine to answer before the first ring signal arrives. Bill