TIPTEL 1020 Operating Instructions Manual page 7

Assignment of buttons
Pressing the direct dial button for three seconds enables a telephone
3 secs
number and a name to be entered.
Mute button: Disables the microphone during a telephone call. When the
phone is in the top-level menu, the call tone can be disabled and enabled
again (for some peace).
R button: Is used for transferring calls within a telephone system. Initiates
special functions in many networks.
Redial: With receiver picked up, it starts to redial the number called last.
With receiver down, it opens the Redial list.
Loudspeaker: Starts to dial a telephone number entered or selected.
Enables/disables the line with the hands-free function/headset (
connector). Switches to loudspeaker mode during a conversation using the
receiver.
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