Yealink SIP-T22P User Manual page 4

Icon Instruction
The IP Phone displays different kinds of icons on its LCD; you can refer to
the following for their meanings:
Flashes when the internet is disconnected
Account register failed
Account registering
Account register successful
Missed Calls
Call in
Call out
Input Method: all letters and numbers
Input Method: numbers
Input Method: letters in lower case
Input Method: letters in upper case
Call mute
Call hold
Voicemail
SMS
Call forward
Do not disturb
Auto answer
In handset mode
In headset mode
4 Spitfire_Yealink_SIP-T22P