SETUP WITH UP/DOWN KEY
• TO ADJUST RINGER TONE
DT300 Series
• TO ADJUST HANDSET RECEIVER Press Up/Down ( or / ) key during ringing.
VOLUME
DT300 Series
Press Up/Down ( or / ) key in the off-hook
status or during the call.
RING
LCD indication for North America, Latin America, Asia,
Middle East and Russia
• TO ADJUST LCD CONTRAST
DT300 Series
HANDSET
Press Up/Down ( or / ) key in the on-hook
status.
LCD indication for Australia
HANDSET LCD
• TO ADJUST SPEAKER VOLUME
DT300 Series
Press Up/Down ( or / ) key during
speakerphone operation or during the call.
SPEAKER
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