I need a manual for a DT300 series, model # DLV(XD) Z-Y(BK) stock # 68004 lot # J29C1EA-G. I am a new office manager with Southwest Foot Institute and when I came in to this postion I have never used this type of phones before the old office manager never kept the manuel. I am not sure how to change recordings and settings. My email is kim@swfoot.net. If I could get something to help me I would be very greatful.