Yealink SIP-T19 - Manual (Page 80)

User Guide for the SIP-T19P/SIP-T19 IP Phone
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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 during an active call.
The LCD screen indicates that the call is on mute.
To un-mute a call:
1. Press again to un-mute the call.
You can place an active call on hold. Only one active call can be in progress at any time.
Other calls can be made and received while placing the original call on hold. When you
place a call on hold, your IP PBX may play music on hold to the other party while
waiting.
To place a call on hold:
1. Press the Hold soft key during a call.
The LCD screen indicates that the call is on hold.
Note
To resume a held call:
1. Press the Resume soft key.
The phone will beep softly every 30 seconds to remind you that you still have a call on
hold.