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