Yealink VP530 - Manual (Page 73)

Basic Call Features
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7. Tap to return to the idle screen.
You can also configure a call return key via web user interface at the path DSS
Key->Memory Key (or Line Key).
You can mute the microphone of the active audio device during an active call, and then
the other party cannot hear you.
To mute a call:
1. Press or tap during an active call.
The phone LCD screen shows the call is on mute and the event indicator LED flashes
green.
To un-mute a call:
1. Press or tap again to un-mute the call.
You can place an active call on hold. At any time, at most one active call can be in
progress on your phone, other calls can be received and made while placing the
original call on hold. When placing a call on hold, your IP PBX might play a melody or
message to the other party while waiting.
To place a call on hold:
1. Press the Hold soft key during an active call.