Sharp FO-50 Operation Manual page 61

Using TEL Reception Mode
3
If the other party first speaks with you
and then wants to send a fax, press the
START key after speaking. (Press
your START key before the sender
presses their Start key.)
• When RECEIVING appears in the
display, hang up.
START
Answering with an extension phone
1
Answer the extension phone when it
rings.
2
If you hear a soft fax tone, wait until
your fax responds (the extension
phone will go dead), then hang up.
Beep
60
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RECEIVING
Phone goes dead