Binatone 2300 User Manual page 22

Then press the MENU/OK button.
Scroll DOWN until yiu see "RING SETUP".
Press the MENU/OK button. Then it will display "INT RING" or scroll
DOWN to select "EXT RING".
Press the MENU/OK button. The display will show "MELODY".
Then press the MENU/OK button to select and the display will show
"MELODY 1".
Press the UP or DOWN button to scroll through the Melody list (from 1 to 10).
or
Then press the MENU/OK button to confirm the setting.
Press the PHONEBOOK/CANCEL button to return to the previous menu.
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