Plantronics BackBeat 903 User Manual page 12

Headphones Phone Controls and Indicators
Transfer active call
to/from headphones
Online indicator on/off
(default on)
Missed call indication
Action
2 second press on call control
button when on an active call
Press mute and call control
together when headphones
is on.
None
Indicator Light
None
Off: 4 blue flashes,
then fade out
On: 4 blue flashes,
then fade in
LED triple purple
flash for 5 minutes
Tone
Transfer call from
headphones to phone:
Double low tone
Transfer call from phone
to headphones: Single low
tone followed by a double
low tone
Single low tone, then
double low tone
None
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