Brother MFC-J3930DW Online User's Manual page 616
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Troubleshooting
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> Telephone Line Interference/VoIP
Telephone Line Interference/VoIP
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 changing the modem speed to minimise errors in fax operations.
>> MFC-J3530DW
>> MFC-J3930DW
MFC-J3530DW
1. Press
[Settings] > [All Settings] > [Initial Setup] > [Compatibility].
2. Press the option you want.
•
[Basic(for VoIP)] reduces the modem speed to 9,600 bps and turns off colour fax receiving and
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.
•
[High] sets the modem speed at 33,600 bps.
3. Press
.
•
VoIP (Voice over IP) is a type of phone system that uses an Internet connection, rather than a traditional
phone line.
•
Brother does not recommend the use of a VoIP line. VoIP limitations in general can cause some
functions of the fax machine not to work correctly.
MFC-J3930DW
1. Press
[Settings] > [All Settings] > [Initial Setup] > [Compatibility].
2. Press the option you want.
•
[Basic(for VoIP)] reduces the modem speed to 9,600 bps and turns off colour fax receiving and
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.
•
[High] sets the modem speed at 33,600 bps.
3. Press
.
•
VoIP (Voice over IP) is a type of phone system that uses an Internet connection, rather than a traditional
phone line.
•
Brother does not recommend the use of a VoIP line. VoIP limitations in general can cause some
functions of the fax machine not to work correctly.
Related Information
•
Telephone and Fax problems
•
Voice Over Internet Protocol (VoIP/Telephone Line Interference)
•
Error and Maintenance Messages
>
If You Are Having Difficulty with Your Machine
>
Telephone and Fax
609
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