User Guide for the SIP-T54S Media IP Phone 
92 
Deactivating the Bluetooth Mode 
To deactivate the Bluetooth mode via phone user interface: 
1.  Press Menu->Basic->Bluetooth. 
2.  Press          or          , or the Switch soft key to select Off from the Bluetooth field. 
 
3.  Press the Save soft key to accept the change. 
The Bluetooth headset won’t be connected anymore, but it will still be paired. When you 
activate the Bluetooth mode again, the paired Bluetooth headset will appear in the Paired 
Bluetooth Device list. 
Bluetooth mode is configurable via web user interface at the path Features->Bluetooth. 
DSS Keys 
There are three types of DSS keys: Line Keys, Programable Keys and Ext Keys. Details will be 
introduced in the following. The SIP-T54S media IP phone supports 27 line keys and 13 
programable keys. 
Line Keys 
You can assign predefined functionalities to line keys. You can also define a label for a line key 
feature which will appear on the LCD screen. Line keys allow you to quickly access features such 
as recall and voice mail. The line key LEDs will indicate the monitored status when the line keys 
are assigned with particular features, such as BLF. The default key type of line key 1-16 is Line. 
The default key type of line key 17-27 is N/A, which indicates that this line key provides no 
functionality until configuration. 
To assign functionality to a line key via phone user interface: 
1.  Press Menu->Features->DSS Keys. 
2.  Select the desired line key, and then press the Enter soft key. 
3.  Select the desired key type from the Type field. 
4.  (Optional.) Select the desired key event type from the Key Type field. 
5.  (Optional.) Select the desired line from the Account ID field.