User Guide for the SIP-T46G IP Phone42Bluetooth Devices list.DSS KeysThere are two types of DSS keys: Line Keys and Ext Keys. Details will be introduced in thefollowing. The SIP-T46G IP phone supports 27 line keys.Line KeysYou can assign predefined functionalities to line keys. You can also define a label for a line keyfeature which will appear on the LCD screen. Line keys allow you to quickly access features suchas recall and voice mail. The default key type of line key 1-16 is Line. The default key type of linekey 17-27 is N/A, which indicates that this line key provides no functionality until configuration.To assign functionality to a line key:1. Press Menu->Features->Programmable buttons.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.6. (Optional.) Enter the string that will appear on the LCD screen in the Label field.7. (Optional.) Enter the corresponding value in the Value field.8. (Optional.) Enter the corresponding value in the Extension field.9. Press the Save soft key to accept the change or the Back soft key to cancel.NoteYou can assign functionalities to 27 line keys. These 27 line keys are indicated on three pages.When you assign functionality to line keys located in line key 1-10, the labels of line keys areindicated on the first page. The following figure shows an example:When you assign functionality to line key located in line key 11-27, the label of the line key10-18 are indicated on the second page, and the labels of the line key 19-27 are indicated onWhen t he phone is idle, you can also long press the line ke y to configure it directly on the phone .