Yealink SIP-T28P - Manual (Page 96)

User Guide for the SIP-T28P IP Phone
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When the called party becomes idle, the following prompt appears on the LCD
screen of the phone:
2. Press the OK soft key to redial the number.
Note
You can press a call return key to place a call back to the last incoming call.
To configure a call return key via phone user interface:
1. Press Menu->Features->DSS Keys->Memory Keys (or Line Keys).
2. Select a desired DSS key.
3. Press or , or the Switch soft key to select Key Event from the Type field.
4. Press or , or the Switch soft key to select Call Return from the Key Type field.
5. Press the Save soft key to accept the change or the Back soft key to cancel.
Call return key is configurable via web user interface at the path DSSKey.
You can mute the microphone of the active audio device during an active call, and then
the other party cannot hear you.
Call completion is not available on all servers. For more information, contact your system
administrator.