User Guide for the SIP-T42G IP Phone323. Press the OK soft key to unlock the phone.The icon disappears from the LCD screen.You can long press or wait for a period of time (if configured) to lock the phoneagain.NoteTo deactivate the phone lock via phone user interface:1. Press Menu->Settings->Basic Settings->Phone Lock.2. Press or , or the Switch soft key to select Disabled from the Lock Enable field.3. Press the Save soft key to accept the change.Phone Lock is configurable via web user interface at the path Features->Phone Lock.Audio SettingsVolumeYou can press the Volume key to adjust the ringer volume when the phone is idle or ringing.You can also press the Volume key to adjust the receiver volume of currently engaged audiodevices (handset, speakerphone or headset) when the phone is in use.To adjust the ringer volume:When the phone is idle:1. Press to adjust the ringer volume.You can also unlock the phone by entering administrator password. When you enter theadministrator password to unlock the phone, the phone will turn to the Change PIN screen.