Yealink SIP-T21 E2 User Manual page 73

When DND is in custom mode:
1. Press the DSS key to access the custom DND screen. You can activate or deactivate
DND for one or all accounts.
Note
When DND is activated, the DND key LED will illuminate solid green, and the incoming
calls will be rejected automatically.
SMS
You can use this key feature to quickly access text message. For more information, refer
to Short Message Service (SMS)
Dependencies:
Usage: Press the DSS key when the phone is idle to access text message.
Group Listening
You can use this key feature to activate the Speakerphone and Handset/Headset mode
at the same time. It is suitable for the group conversations which have more than one
person present at one end. You are able to speak and listen through the
handset/headset, while the others nearby can only listen through the speaker.
Dependencies:
Usage:
1. During a call, press the DSS key to activate the group listening mode.
You can then speak and listen through the handset/headset, while other people at
your side can only listen through the speaker at the same time.
2. Press the DSS key again to deactivate the group listening mode.
Zero Touch
You can use this key feature to quickly configure auto provision and network
parameters.
Dependencies:
Usage:
1. Press the DSS key to access the zero touch screen.
2. Press the OK soft key within a few seconds.
3. Configure the network parameters in the corresponding fields.
on page 148.
Type (Key Event)
Key Type (SMS)
Label (key label displayed on the LCD screen)
Type (Key Event)
Key Type (Group Listening)
Label (key label displayed on the LCD screen)
Type (Key Event)
Key Type (Zero Touch)
Label (key label displayed on the LCD screen)
Customizing Your Phone
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