Yealink SIP-T20 - Manual (Page 15)

Overview
3
Icons appearing on the LCD screen are described in the following table:
Icon Description
Network is unavailable
Hands-free speakerphone mode
Handset mode
Headset mode
123
Numeric input mode
abc
Multi-lingual lowercase letters input mode
ABC
Multi-lingual uppercase letters input mode
2aB
Alphanumeric input mode
Voice Mail
Auto Answer
Do Not Disturb
Call Forward/Forwarded Calls
Call Mute
Keypad Lock
Received Calls
Placed Calls
Missed Calls