Philips D721 User Manual
Page 14
2.6
Tones
Acoustic signals when telephoning:
• You hear the dial tone when you lift the handset when the telephone is
idle or when you press the hands free key.
• The ringing tone sounds when the called connection is available.
• The busy tone sounds when the connection you are ringing is busy.
• The camp-on busy tone advises you of another pending call during a
conversation.
• Tone ringing signals calls with the preset melody and volume.
Acoustic signals during operation and programming:
• The positive acknowledgement tone confirms correct input.
• The negative acknowledgement tone indicates an incorrect operation.
13
Ringing tone
Dial tone
Busy tone
Positive acknowledgement tone
Negative acknowledgement tone
Call waiting tone
Audible tones (through the handset or the loudspeaker when calling or programming)
tone
Representation of the tones
pause
Ringing tones
Calling an ISDN phone:
3,5
0,5
(repeated)
(Figures in seconds )
(repeated)
(repeated)
Calling an analog port
(
Basic 20 only): (repeated)
0,5
0,5
0,5
0,5
0,5
0,5
0,6
0,2
0,2
0,6
0,2
0,2
0,5
0,6
0,5
0,5
0,5
0,5
0,5
0,5
0,5
3
0.1 each
4
1
1
4
1
1
Continuous tone