User Guide

Customizing Your Phone
69
Dual Headset
You can use two headsets when enabling dual headset. To use this feature, you must physically
connect headsets to the headset jack and handset jack respectively. Once the phone connects to
a call, the headset connected to the headset jack will have full-duplex capabilities, while the one
connected to the handset jack will only be able to listen.
To enable dual headset via web user interface:
1. Click on Features->General Information.
2. Select Enabled from the pull-down list of Dual Headset.
3. Click Confirm to accept the change.
Note
DSS Keys
There are two types of DSS keys: Line Keys and Programable Keys. The details will be
introduced in the following. The SIP-T21(P) E2 IP phone supports 2 line keys and 11
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 each line key is Line.
Dual headset is configurable via web user interface only.