DND Off Code: The Code is used to turn off DND on server’s
side, if configured, IP phone will send a SIP message to server
to turn off DND on server side if you press DND when DND is
on.
Intercom: Intercom allows users to establish a call directly
with the callee.
Active: To enable or disable Intercom feature.
Intercom Mute: If enabled, once the call established, the
callee will be muted.
Return Code When Refuse: Allows user to assign specific
code as return code to SIP server when an incoming call is
rejected.
Auto Answer Delay: To configure delay time before an
incoming call is automatically answered.
Auto Answer Mode: To set video or audio mode for auto
answer by default.
Direct IP: Direct IP call without SIP proxy.