It is recommend that you use your cell phone's voice mail for best messaging results. You may connect a standard answering machine to this equipment if you set the number of rings to answer on your answering machine at a lesser number than your voicemail, i.e. 2. Remember that CDMA networks garble DTMF (touch tones) over the air. Accessing any answering machine remotely through a CDMA phone or network may be impossible.