User Guide for the SIP-T27G IP Phone 
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You can long press            or wait for a period of time (if configured) to lock the phone 
again. 
Note 
To deactivate the phone lock via phone user interface: 
1.  Press Menu->Settings->Basic Settings->Phone Lock. 
2.  Enter the desired PIN (default PIN: 123) in the Unlock PIN field, and then press the OK soft 
key. 
3.  Press          or          , or the Switch soft key to select Disabled from the Lock Enable field. 
 
4.  Press the Save soft key to accept the change. 
Phone lock is configurable via web user interface at the path Features->Phone Lock. 
Audio Settings 
Volume 
You 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 audio 
devices (handset, speakerphone or headset) when the phone is in use. 
Note 
   
You can also unlock the phone by administrator password. When you enter the administrator 
password to unlock the phone, the phone will turn to the Change PIN screen. 
Your system administrator can disable you to adjust the ringer volume. Contact your system 
administrator for more information. 
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