Switch between LINE1 and LINE2
If the intercom number has set, call this number directly
If the intercom number has not set, press this key will have no effect
Place active call on hold, resume the call on hold.
Press to enable/disable record feature in an active call or an conference.
Press the 4 navigation keys to move up/down/left/right. Press the round
button in the center to enter Keypad Configuration MENU when phone is in
idle. The round button "MENU" can also be used as ENTER key when in
Keypad Configuration
Press to mute/unmute an active call.
Used when you plugged a headset
Transfer an active call to another number.
Establish 3-way conference with other 2 parties.
Enter the digits and then press Send to dial out the number.
Hands-free function. You can call without using handset. Loudspeaker
function
Press "-" or "+" to adjust the volume.
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