Grandstream Networks WP820 User Manual page 8

Incoming Call notification
Voicemail notification (Urgent)
Voicemail notification (Normal)
Mute enabled icon
DND enabled icon
Bluetooth enabled icon
Bluetooth connected icon
SRTP & TLS enabled icon
Contacts
SMS
Call History
Voice Mail
Diagnosis
Settings
Applications
Status
Broadsoft XSI
Note
SRTP & TLS enabled icon will be displayed only in case signaling and media are both encrypted.
WP820 LED Status