Brother MFC-3820CN - Manual (Page 102)

QUICK-DIAL NUMBERS AND DIALING OPTIONS 7 - 6
Pause
Press Redial/Pause to insert a 3.5-second pause between
numbers. If you are dialing overseas, you can press Redial/Pause
as many times as needed to increase the length of the pause.
Fax Redial
If you’re sending a fax manually and the line is busy, press
Redial/Pause to try again. Any time you want to make a second call
to the last number dialed, press Redial/Pause to save time.
If you’re sending a fax automatically and the line is busy, the MFC
will automatically redial one time five minutes after the transmission.
Tone or Pulse
If you have a Pulse dialing service, but need to send Tone signals
(for example, for telephone banking), follow the instructions below. If
you have Touch Tone service, you will not need this feature to send
tone signals.
1
Lift the handset of the external phone.
2
Press # on the control panel of your MFC. Any digits dialed after
this will send tone signals.
3
When you hang up, the MFC will return to the Pulse dialing
service.