Grandstream Networks WP820 User Manual page 48

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If CEI is enabled, Events like members joining/Leaving the conference, Invitation sent, Mute/Unmute ... will be displayed in the
call screen as the examples shown below:
Member has joined notification:
Member Mute notification:
Member Left Notification:
Voice Mail
The voice mail feature ensures that you will never miss any important messages. It permits either to leave voice mails to
someone else or receive and listen to voice mails via the handset
)
Figure 66: Member has joined
notification
Figure 67: Member Mute notification
Figure 68: Member left notification