To set the Answering Maching to answer & record on the prerecorded msg, press the clear/mute button on extreme top RHS. Display shows TAD ON. Press 7 button, then 1 button. You will hear a confirmation beep & display will revert to TAD ON. Press & HOLD the clear/mute button again until display returns to normal. Hope this helps, it's a paraphrase of the actual manual..
irisher, December 2007