Yealink SIP-T48G Administrator's Manual page 224

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
3. Click Confirm to accept the change.
Phone lock is used to lock the IP phone to prevent it from unauthorized use. Once the IP
phone is locked, a user must enter the unlock PIN to unlock it.
You can do one of the following to lock the phone:
Long press the pound key when the IP phone is idle.
-
- Press Menu->Settings->Basic Settings->Phone Lock. Then select Lock the phone,
and then press the OK soft key.
The phone will be locked automatically when it has been inactive after the
-
specified time (in seconds). The time is configurable on Lync server only.
If you enable phone lock feature, available features are limited.
Procedure
Phone lock can be only configured locally.
Local
To configure phone lock via web user interface:
1. Click on Features->Phone Lock.
2. Select the desired value from the pull-down list of Phone Lock.
212
Web User Interface
Phone User Interface
Configure the phone lock
feature.
Change the unlock PIN.
Navigate to:
http://<phoneIPAddress>/servlet
?p=features-phonelock&q=load
Configure the phone lock
feature.
Change the unlock PIN.