3. Basic Using3.1. Make a callIn the idle interface, press the account or IP address + Dial key to make a call.3.2. Receive a callXonTel XT-12P will auto answer the incoming call by default. If users disable autoanswer function, press dial key to answer the incoming call.3.3. UnlockUnlock by Pin code: Users can unlock the door by using predefined Public Pin orPrivate Pin. Press # + 8 digit Pin Code + # to unlock, then you will hear “The door isnow opened”. If users input the wrong Pin code, the screen will show “IncorrectCode”.Unlock by RF Card: Place the predefined user card in RF card reader to unlock. Undernormal conditions, the phone will announce “The door is now opened”. If the cardhas not been registered, the phone will show “Unauthorized”.Unlock by DTMF Code: During the talking, the president can press the predefinedDTMF code to remote unlock the door. (Please refer to chapter 4.4.4 about DTMFcode setting). Then you will also hear “The door is now opened”.