5
R20A
Admin Guide
2.3. Unlock
2.3.1.Unlock by RF Card
Place the predefined user cards in RFID card reader to unlock.
Under normal conditions, R20A will announce “The door is now
opened”. Both 13.56MHz and 125KHz RFID cards are supported
on R20A.
2.3.2.Unlock by DTMF Codes
Users can press the predefined DTMF code from an answer unit to
remotely unlock the door during the call. Users will also hear “The
door is now opened.”
