VoIP Handset User Guide – Yealink T27 Series
5
LED Information
Power Indicator LED:
The phone is initialising
Fast flashing red (300ms)
The phone received a voice
The phone is off
The phone is idle
Line Key LED (configured as a Line Key):
The phone is initialising
The phone received a voice
The phone is off
The phone is idle
Line Key LED (configured as BLF for line monitoring and call transfers):
The monitored line is idle
Fast flashing red (200ms)
The monitored line is ringing
The monitored line is busy
The monitored line doesn’t exist on this system
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General