Panasonic S-ICX Technical Manual page 195

Section 700 - Operation
b. Press the fourth FF key from the left on the bottom row.
To enter o:
a. Press the third soft key from the top right.
b. Press the third FF key from the left on the bottom row.
Example 2. Small-Display Phone
S-ICX-50-700 S-ICX (International) issued October 2000
Chapter 5. Key Telephone Features
195