Brother IntelliFax-3550 Service Manual page 101

Selectors 4 through 6:
Upon detection of the 2nd dial tone for the time length specified by these selectors, the
equipment starts dialing.
This setting is effective only when the 2nd dial tone detection function is activated by selec-
tors 1 through 3 (Setting 1, 1, 0 or 1, 1, 1).
This function does not apply in those countries where no dial tone detection function is sup-
ported.
Selector 7: No. of 2nd dial tone detection times
This selector sets the number of dial tone detection times required for starting dialing.
Selector 8: 2nd dial tone interrupt detecting time
This selector sets the allowable time length of an interrupt which should not be interpreted as
an interrupt in the 2nd tone dialing.
Detection of international tone
V – 19