Yealink CP920 - ReCall

Using Your Phone with SIP/Cloud Account
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ReCall
You can tap a recall key to place a call back to the last incoming call.
To configure a recall key via web user interface:
1. Click on Dsskey->Programable Key.
2. Select the desired programable key.
3. Select ReCall from the pull-down list of Type.
4. Click Confirm to accept the change.
Note
Call Mute
You can mute the local microphone during an active call so that the other party cannot hear
you, but you can still hear the other party. You can also mute the microphone while dialing so
that the other party cannot hear you when the call is set up. It helps prevent the other party
from hearing the informal discussion when auto answer is enabled on his/her phone.
A recall key is configurable via web user interface only.