Press the STORE button, "
Location?" appears in the dispaly screen, dial one of the digits 0 through 9 on the dialpad or press one of the 3 memory buttons:A, B, or C. Press the STORE button, enter the phone number using the dialpad, press the STORE button.
There are two ways to use the stored numbers. With the phone idle, press the DIAL button, press the memory button(A, B, or C) or one of the dialpad numbers 0 through 9, then lift the handset or press the speaker button and the stored number will be dialed. The other way is to first lift the handset or press the speaker button, press the DIAL button then choose the memory location by pressing one of the A, B, or C memory buttons or dial one of the digits 0 through 9 on the dial pad and the stored number will be dialed . I have included a link where you can download the manual.
http://www.home-electronics.net/USER-GUIDES/29369_DOM_ES_CD_IB.pdf