Casio DT-X100 Series Software Manual page 184

(3)Ping(4)
"Ping (4)" when a button is pressed, Ping Utility screen is indicated.
(4)Signal(5)
"Signal (5)" when a button is pressed, an electric field strong history indication screen is indicated.
(5)Disp - Options
When "Disp - Options" is chosen, a remote DTE search condition setting screen is indicated.
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