Plantronics 975 User Manual page 16

Indicator Lights and tones
Incoming call
Answer call
Call in progress
Volume up or
down
End call
Missed call
Out of range
Back in range
Turning on
multipoint
Turning off
multipoint
note
By default, the online indicator is turned off. To turn on the
online indicator, see "Earpiece Controls" on page 8.
12
Light
3 white flashes every
2 seconds
1 white flash
1 white flash every
2 seconds
1 white flash for each volume
adjustment
1 white flash
3 white flashes every
10 seconds for 5 minutes
None
Flashes to match current
earpiece state
2 white flashes
1 white flash
Tone
3 rapid low tones
every 2 seconds
1 low tone
None
1 tone with volume
corresponding to
volume level
2 low tones to
indicate maximum
volume level reached
1 low tone
None
1 high tone
1 low tone
None
None