To set the ring tone
You can choose from 6 ring tones.
Press the Programming key.
Press 5.
The current setting is displayed (1/6 for example).
Enter your choice of ring tone 1, 2, ..., or 6.
The selected ring tone is played
Press the Programming key to save the setting
To set the ring tone volume
You can choose from 3 ring tone volumes.
Press the Programming key.
Press 6.
The current setting is displayed (1/3 for example).
Enter your choice of volume 1(low), 2(medium) or 3 (high).
Press the Programming key to save the setting.
To change the earpiece volume
You can choose from 3 earpiece volume levels.
Press the Programming key.
Press 4.
The current setting is displayed (1/3 for example).
Enter your choice of volume 1(low), 2(medium) or 3 (high).
Press the Programming key to save the setting.
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http://www.philips.com/faqs/dect
Programming the DECT 111