Panasonic KX-F3100 - Manual (Page 67)

Transmitting documents with manual operation
When the unit is the ANS/FAX mode, your caller may send documents as below.
■ From a touch tone phone:
Your caller may call your unit, and then press the asterisk key twice ( * * ) during or after
the greeting message to change the unit to the fax mode.
They then may start transmission upon hearing the fax tone by pressing their start or transmit
button.
■ From a rotary (pulse) phone:
Your caller may call your unit, and then press the mute button or cover the mouthpiece of
their handset for about 5 seconds to change the unit to the fax mode after the greeting
message.
They then may start transmission upon hearing the fax tone by pressing their start or transmit
button.
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