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Sending Faxes
Difficulty Suggestions
Cannot send a fax. Check all line cord connections. Make sure the telephone line cord is plugged into 
the telephone wall socket and the LINE socket inside the machine.
Print the Transmission Verification Report and check for an error. (See Advanced 
User’s Guide: Reports.)
Ask the other party to check that the receiving machine has paper.
Poor fax send quality. Try changing your resolution to Fine or S.Fine. Make a copy to check your 
machine's scanner operation. If the copy quality is poor, clean the scanner. (See 
Cleaning the scanner glass on page 56.)
Transmission Verification Report 
shows RESULT:ERROR.
There is probably temporary noise or static on the line. Try sending the fax again. 
If you send a PC FAX message and see RESULT:ERROR on the Transmission 
Verification Report, your machine may be out of memory. To gain extra memory, 
you can print fax messages from the machine’s memory. (See Advanced User’s 
Guide: Printing a fax from the memory.) If the problem continues, ask the 
telephone company to check your telephone line.
If you often get transmission errors due to possible interference on the telephone 
line, try changing the machine's Compatibility setting to Basic(for VoIP). 
(See Telephone line interference / VoIP on page 91.)
Vertical black lines when sending. Black vertical lines on faxes you send are typically caused by dirt or correction fluid 
on the glass strip. Clean the glass strip. (See Cleaning the scanner glass 
on page 56.)
Handling Incoming Calls
Difficulty Suggestions
The machine “hears” a voice as a 
CNG Tone.
If Fax Detect is set to On, your machine is more sensitive to sounds. It may 
mistakenly interpret certain voices or music on the line as a fax machine calling 
and respond with fax-receiving tones. Deactivate the machine by pressing 
Stop/Exit. Try avoiding this problem by turning Fax Detect to Off. 
(See Fax Detect on page 28.)
Sending a fax call to the machine. If you answered on an extension or external telephone, press your Remote 
Activation Code (the factory default is l 51). If you answered on an external 
telephone, press Mono Start, and press 2 to receive the fax. When your machine 
answers, hang up.
Custom features on a single line. If you have Call Waiting, Call Waiting/Caller ID, Caller ID, Voice Mail, an 
answering machine, an alarm system or other custom feature on a single 
telephone line with your machine, it may create a problem sending or receiving 
faxes.
For example: If you subscribe to Call Waiting or another custom service and its 
signal comes through the line while your machine is sending or receiving a fax, the 
signal can temporarily interrupt the faxes. Brother's ECM (Error Correction Mode) 
feature should help overcome this problem. This condition is related to the 
telephone system industry and is common to all devices that send and receive 
information on a single, shared line with custom features. If avoiding a slight 
interruption is crucial to your business, we recommend using a separate 
telephone line with no custom features.