... , Surface mount only. 3, Multi-way communication, video intercom with Gate Station, Guard Station & Front door station. ... 4, Door to door intercom. 5, Monitor the outside camera capture. 6, ... , air-condition, curtain^) 9, Send alarm message to Guard Center when in emergency. 10, Max. 8 ... alarm zones, SMS alarm to user's Mobile phone 11, Lift call function( ...