Troubleshooting 
65
B
Dial Tone detection B
When sending a fax, by default your machine 
will wait for a fixed amount of time before it 
starts to dial the number. By changing the 
Dial Tone setting to Detection, you can 
make your machine dial as soon as it detects 
a dial tone. This setting can save a small 
amount of time when sending a fax to many 
different numbers. If you change the setting 
and start having problems when dialling, you 
should change it back to the No Detection 
setting.
a Press (Settings).
b Press All Settings.
c Swipe up or down or press a or b to 
display Initial Setup.
d Press Initial Setup.
e Swipe up or down or press a or b to 
display Dial Tone.
f Press Dial Tone.
g Press Detection or No Detection.
h Press .
Telephone Line Interference 
or VoIP System B
If you are having problems sending or 
receiving a fax due to possible interference 
on the telephone line, or if you are using a 
VoIP system, we recommend that you 
change the modem speed to minimize errors 
in fax operations.
a Press (Settings).
b Press All Settings.
c Swipe up or down or press a or b to 
display Initial Setup.
d Press Initial Setup.
e Swipe up or down or press a or b to 
display Compatibility.
f Press Compatibility.
g Press Normal or Basic(for VoIP).
 Basic(for VoIP) reduces the 
modem speed to 9,600 bps and 
turns off colour fax receiving and 
Error Correction Mode (ECM), 
except for colour fax-sending. 
Unless interference is a recurring 
problem on your telephone line, you 
may prefer to use it only when 
needed.
To improve compatibility with most 
VoIP services, Brother recommends 
changing the compatibility setting to 
Basic(for VoIP).
 Normal sets the modem speed at 
14,400 bps.
h Press .
VoIP (Voice over IP) is a type of phone 
system that uses an Internet connection, 
rather than a traditional phone line.