How do I increase the number of rings on my Brother MFC-780n fax/printer before it picks up?

Setting the Ring Delay
The Ring Delay sets the number of times the
MFC rings before it answers in Fax Only or
Fax/Tel mode. If you have extension
phones on the same line as the MFC or
subscribe to the telephone company’s
Distinctive Ring service, keep the Ring Delay
setting of 4.
(See Operation from extension telephones on
page A-4 and Easy Receive on page 4-3.)
1 If it is not illuminated in green, press
(Fax).
2 Press Menu/Set, 2, 1, 1.
3 Press ▲ or ▼ to select how many times
the line rings before the MFC answers
(00 - 04).
Press Menu/Set.
(If you select 00, the line won’t ring at
all.)
4 Press Stop/Exit.
Initial Setup
1.Receive Mode
Current Receive Mode
Fax : Fax Only
F/T : Fax/Tel
TAD : External TAD
Mnl : Manual
Setup Receive
1.Ring Delay