Activate/Deactivate Hands-Free Mode; Muting The Microphone; Adjusting Speaker And Earpiece Volume; Figure 20: Handset Language - Grandstream Networks DP750 User Manual

Activate/Deactivate Hands-Free Mode

This function allows you to make a call without having to hold the handset in your hand.
1. Press the Hands free key
hands free mode.
2. Press the Hands free key

Muting the Microphone

Press the Mute key
without the other party hearing you and the icon of mute
Mute key again to switch the microphone back on.

Adjusting Speaker and Earpiece Volume

Press left key or right key
speaker. You can choose between 5 different levels. The default level is 3:

Figure 20: Handset Language

while you are making a call or on the idle screen to activate
again to deactivate the hands free function.
to switch off the microphone during an established call. You can now talk freely
while you are on an established call to set the volume of the earphone /
Volume 1
Volume 2
Volume 3
DP750/DP720 User Guide
will be displayed on the screen. Press the
Volume 4
Volume 5
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