Mute and Unmute a call GRP2601 Grandstream
The mute button can be used to either set the phone on mute or on DND depending on how “Mute key function while idle” option is configured on the web interface. If it’s set to “DND”, clicking the mute button while idle will put the phone in DND mode and DND icon will be displayed on top of LCD screen .
If set to “Idle Mute”, Pressing on mute key will set the phone on mute. DND can be enabled when the phone is on idle state by pressing the DND softkey