Set Telephone Line
Compatibility for
Interference and VoIP
Systems
Related Models:
MFC-L5700DW/MFC-L5800DW/MFC-L5850DW/
MFC-L5900DW/MFC-L6700DW/MFC-L6800DW
Problems sending and receiving faxes due to
possible interference on the telephone line
may be solved by reducing the modem speed
to minimize errors in fax transmission. If you
are using a Voice over IP (VoIP) service,
Brother recommends changing the
compatibility to Basic (for VoIP).
• VoIP is a type of phone system that
uses an Internet connection, rather
than a traditional phone line.
• Telephone providers frequently bundle
VoIP together with Internet and cable
services.
1
Press [Settings] > [All
Settings] > [Initial Setup] >
[Compatibility].
2
Press the option you want.
• Select [High] to set the modem
speed to 33600 bps.
• Select [Normal] to set the modem
speed to 14400 bps.
• Select [Basic(for VoIP)] to
reduce the modem speed to 9600
bps and turn off Error Correction
Mode (ECM). Unless interference is a
recurring problem on your telephone
line, you may prefer to use this option
only when needed.
3
Press
.
• Fax and Telephone Problems on page 50
Related Information
Receive Modes
Related Models:
MFC-L5700DW/MFC-L5800DW/MFC-L5850DW/
MFC-L5900DW/MFC-L6700DW/MFC-L6800DW
Some receive modes answer automatically
(Fax Only Mode and Fax/Tel Mode). You may
want to change the Ring Delay before using
these modes.
Fax Only Mode
([Fax] or [Fax Only] in the machine's
menu)
Fax Only Mode automatically answers
every call as a fax.
Fax/Tel Mode
([Fax/Tel] in the machine's menu)
Fax/Tel Mode helps you manage incoming
calls, by recognizing whether they are fax
or voice calls and handling them in the
following ways:
• Faxes will be received automatically.
• Voice calls will start the F/T ring to tell
you to pick up the call. The F/T ring is a
fast pseudo/double-ring made by your
machine. See Related Information:
External and Extension Telephones.
Manual Mode
([Manual] in the machine's menu)
Manual Mode turns off all automatic
answering operations unless you are using
the Distinctive Ring Receive feature.
To receive a fax in Manual Mode, lift the
handset of the external telephone
connected to the machine or press
[Fax] and then [Hook].
When you hear fax tones (short repeating
beeps), press [Fax Start] and then
[Receive] to receive a fax. Use the Easy
Receive feature to receive faxes when you
have lifted a handset on the same line as
the machine.
30
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