User Guide for the SIP-T54S Media IP Phone 
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To deactivate the headset mode: 
1.  Press          again on the phone. 
The HEADSET key LED goes out and the headset icon          disappears from the idle screen. 
Headset Prior 
You can use headset in priority when headset prior feature is enabled. This feature is especially 
useful for permanent or full-time headset users. 
To enable headset prior via web user interface: 
1.  Click on Features->General Information. 
2.  Select Enabled from the pull-down list of Headset Prior. 
 
3.  Click Confirm to accept the change. 
To use headset prior, you should activate the headset mode in advance: 
1.  Physically connect the headset. 
2.  Press          to activate the headset mode. 
Note   
Dual Headset 
You can use two headsets when dual headset feature is enabled. To use this feature, you must 
If headset prior is enabled, the headset mode will not be deactivated until you press the 
HEADSET key again. 
If headset prior is disabled, the headset mode can be deactivated by pressing the Speakerphone 
key or the HEADSET key. 
Headset prior is configurable via web user interface only.