Do you have a question about the Opis 60s cable and is the answer not in the manual?
Connect phone, receiver, and cables. Plug receiver into phone bottom (1), line cable into phone bottom (2) and phone outlet.
Pick up receiver, wait for dial tone, and dial the number.
Pick up the receiver to accept an incoming call.
Switch between classic pulse dial and modern DTMF tones using the bottom switch (3).