User Guide

5.7.3. DND(Do NotDisturb)
DND allows IT82A(869) to ignore any incoming calls.
DND Emergency: Calls from the Authorized number can still
be received after enable this function.
DND Authorized Number: Setup authorized numbers for
DND Emergency.
DND Priority: Disable by default.
Account: Select an account for DND.
DND: Enable or disable this function.
Return Code when DND: Determine what response code
should be sent back to server when there is an incoming call if
DND on.
DND On Code: The Code used to turn on DND on server’s
side, if configured, IT82A(869) will send a SIP message to
server to turn on DND on server side if you press DND when
DND is off.