Yealink SIP-T20 User Manual page 49

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 e nable Dual Headset via web user interface:
1. Click on F e atures->General Information.
2. Select Enabled from the pull-down list of Dual-Headset.
3. Click Conf irm to accept the change.
Not e
Dual headset is configurable via web user interface only.
Two types of DSS keys: Line Keys and Programmable Keys. The details will be introduced
in the following. SIP-T20P/SIP-T20 IP phone supports 2 line keys.
Customizing Your Phone
37