Sony IPELA PCS-G70 Operating Instructions Manual page 103

Selecting the "0-9", "A-I", "J-S" or "T-Z" tab opens the submenu. When you
select the desired number or letter from the corresponding submenu, the Phone
Book lists up to six party names which start with the selected number or letter.
Note
You can also search for remote parties by pressing the number buttons on the Remote
Commander. Pressing the number button lists up to six party names which start with the
alphabetical letter on the number button of the Remote Commander.
103
Starting a Conference by Calling a Remote Party