When I have I am charging the handset in the main base (answer machine) incoming calls do not sound properly, sometimes the ringer sounds only once in handy then sounds in the answer machine several times and not activated even exceeds the number of ringer defined. Sometimes records the message and indicates the time of the message but NOT the minutes (stops abruptly) and when the message is played does not advance to the next message. If I remove the handset from the base operating properly