Xerox FAX System (J) Operation Manual page 58

Section 3 Fax Operation (Various Functions)
<Canceling a waiting transmission in the Direct Feed
Transmission mode...>
(1) Press the "Stop" key on the touch panel, or press the
Stop/Clear key.
(inch)
(metric)
(2) If you DO want to cancel the Standby Transmission, press
the "Yes" key.
(inch)
(metric)
3-4